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BaseRepresentation
bin10011101001101110…
…010011111111011111
32000110120102222220010
4103221232103333133
5321203340213043
613405501454303
71344622253652
oct235156237737
960416388803
1021101101023
118a49026572
12410a871393
131cb38527c2
14104262d899
1583776d133
hex4e9b93fdf

21101101023 has 4 divisors (see below), whose sum is σ = 28134801368. Its totient is φ = 14067400680.

The previous prime is 21101101009. The next prime is 21101101027. The reversal of 21101101023 is 32010110112.

Adding to 21101101023 its reverse (32010110112), we get a palindrome (53111211135).

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 21101101023 - 212 = 21101096927 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 (21101101027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3516850168 + ... + 3516850173.

It is an arithmetic number, because the mean of its divisors is an integer number (7033700342).

Almost surely, 221101101023 is an apocalyptic number.

21101101023 is a deficient number, since it is larger than the sum of its proper divisors (7033700345).

21101101023 is an equidigital number, since it uses as much as digits as its factorization.

21101101023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7033700344.

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

The spelling of 21101101023 in words is "twenty-one billion, one hundred one million, one hundred one thousand, twenty-three".

Divisors: 1 3 7033700341 21101101023