1231001020012 has 24 divisors (see below), whose sum is σ = 2194020032400. Its totient is φ = 604169158656.

The previous prime is 1231001020001. The next prime is 1231001020061. The reversal of 1231001020012 is 2100201001321.

It is a super-2 number, since 2×1231001020012² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1231001019974 and 1231001020001.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3716437 + ... + 4034092.

It is an arithmetic number, because the mean of its divisors is an integer number (91417501350).

Almost surely, 2^{1231001020012} is an apocalyptic number.

It is an amenable number.

1231001020012 is a deficient number, since it is larger than the sum of its proper divisors (963019012388).

1231001020012 is a wasteful number, since it uses less digits than its factorization.

1231001020012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7751265 (or 7751263 counting only the distinct ones).

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

Adding to 1231001020012 its reverse (2100201001321), we get a palindrome (3331202021333).

The spelling of 1231001020012 in words is "one trillion, two hundred thirty-one billion, one million, twenty thousand, twelve".