20120231331012 has 24 divisors (see below), whose sum is σ = 47016964565536. Its totient is φ = 6696778330368.

The previous prime is 20120231330987. The next prime is 20120231331019. The reversal of 20120231331012 is 21013313202102.

It is a super-2 number, since 2×20120231331012² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20120231331012.

It is not an unprimeable number, because it can be changed into a prime (20120231331019) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1245672418 + ... + 1245688569.

Almost surely, 2^{20120231331012} is an apocalyptic number.

It is an amenable number.

20120231331012 is an abundant number, since it is smaller than the sum of its proper divisors (26896733234524).

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

20120231331012 is a wasteful number, since it uses less digits than its factorization.

20120231331012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2491361667 (or 2491361665 counting only the distinct ones).

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

Adding to 20120231331012 its reverse (21013313202102), we get a palindrome (41133544533114).

The spelling of 20120231331012 in words is "twenty trillion, one hundred twenty billion, two hundred thirty-one million, three hundred thirty-one thousand, twelve".