25211052113621 has 4 divisors (see below), whose sum is σ = 27502965942144. Its totient is φ = 22919138285100.

The previous prime is 25211052113581. The next prime is 25211052113623. The reversal of 25211052113621 is 12631125011252.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25211052113621 - 2¹⁸ = 25211051851477 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25211052113623) 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, 1145956914245 + ... + 1145956914266.

It is an arithmetic number, because the mean of its divisors is an integer number (6875741485536).

Almost surely, 2^{25211052113621} is an apocalyptic number.

It is an amenable number.

25211052113621 is a deficient number, since it is larger than the sum of its proper divisors (2291913828523).

25211052113621 is a wasteful number, since it uses less digits than its factorization.

25211052113621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2291913828522.

The product of its (nonzero) digits is 7200, while the sum is 32.

Adding to 25211052113621 its reverse (12631125011252), we get a palindrome (37842177124873).

The spelling of 25211052113621 in words is "twenty-five trillion, two hundred eleven billion, fifty-two million, one hundred thirteen thousand, six hundred twenty-one".