1231321103012 has 96 divisors (see below), whose sum is σ = 2915956162560. Its totient is φ = 439345710720.

The previous prime is 1231321102951. The next prime is 1231321103081. The reversal of 1231321103012 is 2103011231321.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 702212 + ... + 1719227.

It is an arithmetic number, because the mean of its divisors is an integer number (30374543360).

Almost surely, 2^{1231321103012} is an apocalyptic number.

It is an amenable number.

1231321103012 is an abundant number, since it is smaller than the sum of its proper divisors (1684635059548).

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

1231321103012 is a wasteful number, since it uses less digits than its factorization.

1231321103012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2421601 (or 2421599 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 1231321103012 its reverse (2103011231321), we get a palindrome (3334332334333).

The spelling of 1231321103012 in words is "one trillion, two hundred thirty-one billion, three hundred twenty-one million, one hundred three thousand, twelve".