1312012100020 has 12 divisors (see below), whose sum is σ = 2755225410084. Its totient is φ = 524804840000.

The previous prime is 1312012099991. The next prime is 1312012100023. The reversal of 1312012100020 is 200012102131.

It can be written as a sum of positive squares in 2 ways, for example, as 524370049956 + 787642050064 = 724134^2 + 887492^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312012100023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32800302481 + ... + 32800302520.

It is an arithmetic number, because the mean of its divisors is an integer number (229602117507).

Almost surely, 2^{1312012100020} is an apocalyptic number.

1312012100020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1312012100020 is an abundant number, since it is smaller than the sum of its proper divisors (1443213310064).

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

1312012100020 is a wasteful number, since it uses less digits than its factorization.

1312012100020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65600605010 (or 65600605008 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 1312012100020 its reverse (200012102131), we get a palindrome (1512024202151).

The spelling of 1312012100020 in words is "one trillion, three hundred twelve billion, twelve million, one hundred thousand, twenty".