1231394367892 has 24 divisors (see below), whose sum is σ = 2321320874600. Its totient is φ = 568184979456.

The previous prime is 1231394367881. The next prime is 1231394367941. The reversal of 1231394367892 is 2987634931321.

It can be written as a sum of positive squares in 4 ways, for example, as 396151912836 + 835242455056 = 629406^2 + 913916^2 .

It is a super-2 number, since 2×1231394367892² (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 in 7 ways as a sum of consecutive naturals, for example, 2945517 + ... + 3337492.

Almost surely, 2^{1231394367892} is an apocalyptic number.

It is an amenable number.

1231394367892 is a deficient number, since it is larger than the sum of its proper divisors (1089926506708).

1231394367892 is a wasteful number, since it uses less digits than its factorization.

1231394367892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6286795 (or 6286793 counting only the distinct ones).

The product of its digits is 11757312, while the sum is 58.

The spelling of 1231394367892 in words is "one trillion, two hundred thirty-one billion, three hundred ninety-four million, three hundred sixty-seven thousand, eight hundred ninety-two".