1230592988921 has 4 divisors (see below), whose sum is σ = 1230679805172. Its totient is φ = 1230506172672.

The previous prime is 1230592988917. The next prime is 1230592988939. The reversal of 1230592988921 is 1298892950321.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1194649000000 + 35943988921 = 1093000^2 + 189589^2 .

It is a cyclic number.

It is not a de Polignac number, because 1230592988921 - 2² = 1230592988917 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1230592988981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43386860 + ... + 43415213.

It is an arithmetic number, because the mean of its divisors is an integer number (307669951293).

Almost surely, 2^{1230592988921} is an apocalyptic number.

It is an amenable number.

1230592988921 is a deficient number, since it is larger than the sum of its proper divisors (86816251).

1230592988921 is an equidigital number, since it uses as much as digits as its factorization.

1230592988921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86816250.

The product of its (nonzero) digits is 5598720, while the sum is 59.

The spelling of 1230592988921 in words is "one trillion, two hundred thirty billion, five hundred ninety-two million, nine hundred eighty-eight thousand, nine hundred twenty-one".