22051125021 has 8 divisors (see below), whose sum is σ = 29409629760. Its totient is φ = 14696685152.

The previous prime is 22051125007. The next prime is 22051125043. The reversal of 22051125021 is 12052115022.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22051125021 - 2⁵ = 22051124989 is a prime.

It is a super-2 number, since 2×22051125021² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22051125001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1003536 + ... + 1025273.

It is an arithmetic number, because the mean of its divisors is an integer number (3676203720).

Almost surely, 2^22051125021 is an apocalyptic number.

It is an amenable number.

22051125021 is a deficient number, since it is larger than the sum of its proper divisors (7358504739).

22051125021 is a wasteful number, since it uses less digits than its factorization.

22051125021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2032435.

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

Subtracting from 22051125021 its reverse (12052115022), we obtain a palindrome (9999009999).

The spelling of 22051125021 in words is "twenty-two billion, fifty-one million, one hundred twenty-five thousand, twenty-one".