1311403123992 has 64 divisors (see below), whose sum is σ = 3543265726560. Its totient is φ = 402072652800.

The previous prime is 1311403123963. The next prime is 1311403123997. The reversal of 1311403123992 is 2993213041131.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 1311403123992.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311403123997) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7391359 + ... + 7566702.

Almost surely, 2^{1311403123992} is an apocalyptic number.

1311403123992 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1311403123992 is an abundant number, since it is smaller than the sum of its proper divisors (2231862602568).

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

1311403123992 is a wasteful number, since it uses less digits than its factorization.

1311403123992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14958364 (or 14958360 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 39.

The spelling of 1311403123992 in words is "one trillion, three hundred eleven billion, four hundred three million, one hundred twenty-three thousand, nine hundred ninety-two".