2125379275921 has 32 divisors (see below), whose sum is σ = 2463951530880. Its totient is φ = 1814690304000.

The previous prime is 2125379275913. The next prime is 2125379275939. The reversal of 2125379275921 is 1295729735212.

It is a cyclic number.

It is not a de Polignac number, because 2125379275921 - 2³ = 2125379275913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2125379275951) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 56647450 + ... + 56684956.

It is an arithmetic number, because the mean of its divisors is an integer number (76998485340).

Almost surely, 2^{2125379275921} is an apocalyptic number.

It is an amenable number.

2125379275921 is a deficient number, since it is larger than the sum of its proper divisors (338572254959).

2125379275921 is a wasteful number, since it uses less digits than its factorization.

2125379275921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42385.

The product of its digits is 4762800, while the sum is 55.

The spelling of 2125379275921 in words is "two trillion, one hundred twenty-five billion, three hundred seventy-nine million, two hundred seventy-five thousand, nine hundred twenty-one".