21311032023012 has 144 divisors (see below), whose sum is σ = 51905541042432. Its totient is φ = 6800683579200.

The previous prime is 21311032022999. The next prime is 21311032023023. The reversal of 21311032023012 is 21032023011312.

It is a self number, because there is not a number n which added to its sum of digits gives 21311032023012.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 690757387 + ... + 690788237.

It is an arithmetic number, because the mean of its divisors is an integer number (360455146128).

Almost surely, 2^{21311032023012} is an apocalyptic number.

It is an amenable number.

21311032023012 is an abundant number, since it is smaller than the sum of its proper divisors (30594509019420).

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

21311032023012 is a wasteful number, since it uses less digits than its factorization.

21311032023012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31238 (or 31109 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 21311032023012 its reverse (21032023011312), we get a palindrome (42343055034324).

The spelling of 21311032023012 in words is "twenty-one trillion, three hundred eleven billion, thirty-two million, twenty-three thousand, twelve".