1391812021112 has 8 divisors (see below), whose sum is σ = 2609647539600. Its totient is φ = 695906010552.

The previous prime is 1391812021091. The next prime is 1391812021139. The reversal of 1391812021112 is 2111202181931.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×1391812021112² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86988251312 + ... + 86988251327.

It is an arithmetic number, because the mean of its divisors is an integer number (326205942450).

Almost surely, 2^{1391812021112} is an apocalyptic number.

It is an amenable number.

1391812021112 is a deficient number, since it is larger than the sum of its proper divisors (1217835518488).

1391812021112 is a wasteful number, since it uses less digits than its factorization.

1391812021112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173976502645 (or 173976502641 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 32.

The spelling of 1391812021112 in words is "one trillion, three hundred ninety-one billion, eight hundred twelve million, twenty-one thousand, one hundred twelve".