21250225666227 has 4 divisors (see below), whose sum is σ = 28333634221640. Its totient is φ = 14166817110816.

The previous prime is 21250225666171. The next prime is 21250225666261. The reversal of 21250225666227 is 72266652205212.

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

It is not a de Polignac number, because 21250225666227 - 2⁸ = 21250225665971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21250225666277) 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, 3541704277702 + ... + 3541704277707.

It is an arithmetic number, because the mean of its divisors is an integer number (7083408555410).

Almost surely, 2^{21250225666227} is an apocalyptic number.

21250225666227 is a deficient number, since it is larger than the sum of its proper divisors (7083408555413).

21250225666227 is an equidigital number, since it uses as much as digits as its factorization.

21250225666227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7083408555412.

The product of its (nonzero) digits is 2419200, while the sum is 48.

The spelling of 21250225666227 in words is "twenty-one trillion, two hundred fifty billion, two hundred twenty-five million, six hundred sixty-six thousand, two hundred twenty-seven".