25021212051 has 16 divisors (see below), whose sum is σ = 38535343488. Its totient is φ = 14272348800.

The previous prime is 25021212023. The next prime is 25021212053. The reversal of 25021212051 is 15021212052.

It is not a de Polignac number, because 25021212051 - 2⁵ = 25021212019 is a prime.

It is a super-2 number, since 2×25021212051² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25021212053) 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, 22299985 + ... + 22301106.

It is an arithmetic number, because the mean of its divisors is an integer number (2408458968).

Almost surely, 2^25021212051 is an apocalyptic number.

25021212051 is a deficient number, since it is larger than the sum of its proper divisors (13514131437).

25021212051 is a wasteful number, since it uses less digits than its factorization.

25021212051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44601122.

The product of its (nonzero) digits is 400, while the sum is 21.

Subtracting from 25021212051 its reverse (15021212052), we obtain a palindrome (9999999999).

The spelling of 25021212051 in words is "twenty-five billion, twenty-one million, two hundred twelve thousand, fifty-one".