23311101021 has 12 divisors (see below), whose sum is σ = 33656264928. Its totient is φ = 14345292624.

The previous prime is 23311100963. The next prime is 23311101041. The reversal of 23311101021 is 12010111332.

It is a happy number.

It is not a de Polignac number, because 23311101021 - 2⁶ = 23311100957 is a prime.

It is a super-2 number, since 2×23311101021² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23311101041) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22988745 + ... + 22989758.

It is an arithmetic number, because the mean of its divisors is an integer number (2804688744).

Almost surely, 2^23311101021 is an apocalyptic number.

It is an amenable number.

23311101021 is a deficient number, since it is larger than the sum of its proper divisors (10345163907).

23311101021 is a wasteful number, since it uses less digits than its factorization.

23311101021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45978532 (or 45978519 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 23311101021 its reverse (12010111332), we get a palindrome (35321212353).

The spelling of 23311101021 in words is "twenty-three billion, three hundred eleven million, one hundred one thousand, twenty-one".