20121331031024 has 20 divisors (see below), whose sum is σ = 39814548637344. Its totient is φ = 9846608802048.

The previous prime is 20121331031023. The next prime is 20121331031027. The reversal of 20121331031024 is 42013013312102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121331031023) 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, 13378543817 + ... + 13378545320.

Almost surely, 2^{20121331031024} is an apocalyptic number.

It is an amenable number.

20121331031024 is a deficient number, since it is larger than the sum of its proper divisors (19693217606320).

20121331031024 is a wasteful number, since it uses less digits than its factorization.

20121331031024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26757089192 (or 26757089186 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 20121331031024 its reverse (42013013312102), we get a palindrome (62134344343126).

The spelling of 20121331031024 in words is "twenty trillion, one hundred twenty-one billion, three hundred thirty-one million, thirty-one thousand, twenty-four".