2125420250421 has 64 divisors (see below), whose sum is σ = 3260888064000. Its totient is φ = 1219806314496.

The previous prime is 2125420250413. The next prime is 2125420250449. The reversal of 2125420250421 is 1240520245212.

It is not a de Polignac number, because 2125420250421 - 2³ = 2125420250413 is a prime.

It is a super-2 number, since 2×2125420250421² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2125420250521) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 69787405 + ... + 69817853.

It is an arithmetic number, because the mean of its divisors is an integer number (50951376000).

Almost surely, 2^{2125420250421} is an apocalyptic number.

It is an amenable number.

2125420250421 is a deficient number, since it is larger than the sum of its proper divisors (1135467813579).

2125420250421 is a wasteful number, since it uses less digits than its factorization.

2125420250421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31438.

The product of its (nonzero) digits is 12800, while the sum is 30.

Adding to 2125420250421 its reverse (1240520245212), we get a palindrome (3365940495633).

The spelling of 2125420250421 in words is "two trillion, one hundred twenty-five billion, four hundred twenty million, two hundred fifty thousand, four hundred twenty-one".