1396892372121 has 10 divisors (see below), whose sum is σ = 2086715765882. Its totient is φ = 931261581360.

The previous prime is 1396892372107. The next prime is 1396892372177. The reversal of 1396892372121 is 1212732986931.

1396892372121 is a `hidden beast` number, since 1 + 3 + 9 + 68 + 92 + 372 + 121 = 666.

It can be written as a sum of positive squares in only one way, i.e., 723120633225 + 673771738896 = 850365^2 + 820836^2 .

It is not a de Polignac number, because 1396892372121 - 2¹³ = 1396892363929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1396892372191) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 8622792340 + ... + 8622792501.

Almost surely, 2^{1396892372121} is an apocalyptic number.

It is an amenable number.

1396892372121 is a deficient number, since it is larger than the sum of its proper divisors (689823393761).

1396892372121 is an equidigital number, since it uses as much as digits as its factorization.

1396892372121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17245584853 (or 17245584844 counting only the distinct ones).

The product of its digits is 1959552, while the sum is 54.

The spelling of 1396892372121 in words is "one trillion, three hundred ninety-six billion, eight hundred ninety-two million, three hundred seventy-two thousand, one hundred twenty-one".