23231311012 has 144 divisors (see below), whose sum is σ = 52027557120. Its totient is φ = 8994585600.

The previous prime is 23231311007. The next prime is 23231311013. The reversal of 23231311012 is 21011313232.

It is a super-2 number, since 2×23231311012² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (23231311013) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 26368812 + ... + 26369692.

It is an arithmetic number, because the mean of its divisors is an integer number (361302480).

Almost surely, 2^23231311012 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23231311012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26013778560).

23231311012 is an abundant number, since it is smaller than the sum of its proper divisors (28796246108).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23231311012 is a wasteful number, since it uses less digits than its factorization.

23231311012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1122 (or 1113 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 23231311012 its reverse (21011313232), we get a palindrome (44242624244).

The spelling of 23231311012 in words is "twenty-three billion, two hundred thirty-one million, three hundred eleven thousand, twelve".