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100311112031021 = 195279532212159
BaseRepresentation
bin10110110011101110000000…
…001100110001101100101101
3111011011122111212111012221022
4112303232000030301230231
5101121444124134443041
6553202142205143525
730062144603601533
oct2663560014615455
9434148455435838
10100311112031021
1129a647816aa891
12b300b7055aba5
1343c83b3165b28
141aab125a68153
15b8e4c779c24b
hex5b3b80331b2d

100311112031021 has 4 divisors (see below), whose sum is σ = 105590644243200. Its totient is φ = 95031579818844.

The previous prime is 100311112031017. The next prime is 100311112031041. The reversal of 100311112031021 is 120130211113001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 100311112031021 - 22 = 100311112031017 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100311112031041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2639766106061 + ... + 2639766106098.

It is an arithmetic number, because the mean of its divisors is an integer number (26397661060800).

Almost surely, 2100311112031021 is an apocalyptic number.

It is an amenable number.

100311112031021 is a deficient number, since it is larger than the sum of its proper divisors (5279532212179).

100311112031021 is an equidigital number, since it uses as much as digits as its factorization.

100311112031021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5279532212178.

The product of its (nonzero) digits is 36, while the sum is 17.

Adding to 100311112031021 its reverse (120130211113001), we get a palindrome (220441323144022).

The spelling of 100311112031021 in words is "one hundred trillion, three hundred eleven billion, one hundred twelve million, thirty-one thousand, twenty-one".

Divisors: 1 19 5279532212159 100311112031021