100312100021 has 4 divisors (see below), whose sum is σ = 114642400032. Its totient is φ = 85981800012.

The previous prime is 100312099981. The next prime is 100312100029. The reversal of 100312100021 is 120001213001.

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 a de Polignac number, because none of the positive numbers 2^k-100312100021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100312099975 and 100312100011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100312100029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7165149995 + ... + 7165150008.

It is an arithmetic number, because the mean of its divisors is an integer number (28660600008).

Almost surely, 2^100312100021 is an apocalyptic number.

It is an amenable number.

100312100021 is a deficient number, since it is larger than the sum of its proper divisors (14330300011).

100312100021 is an equidigital number, since it uses as much as digits as its factorization.

100312100021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14330300010.

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 100312100021 its reverse (120001213001), we get a palindrome (220313313022).

The spelling of 100312100021 in words is "one hundred billion, three hundred twelve million, one hundred thousand, twenty-one".