23021211321 has 24 divisors (see below), whose sum is σ = 33460107200. Its totient is φ = 15252009696.

The previous prime is 23021211293. The next prime is 23021211341. The reversal of 23021211321 is 12311212032.

It is not a de Polignac number, because 23021211321 - 2⁷ = 23021211193 is a prime.

It is a super-2 number, since 2×23021211321² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23021211294 and 23021211303.

It is not an unprimeable number, because it can be changed into a prime (23021211341) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1574175 + ... + 1588731.

Almost surely, 2^23021211321 is an apocalyptic number.

It is an amenable number.

23021211321 is a deficient number, since it is larger than the sum of its proper divisors (10438895879).

23021211321 is a wasteful number, since it uses less digits than its factorization.

23021211321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15645 (or 15642 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 23021211321 its reverse (12311212032), we get a palindrome (35332423353).

The spelling of 23021211321 in words is "twenty-three billion, twenty-one million, two hundred eleven thousand, three hundred twenty-one".