22121330525 has 48 divisors (see below), whose sum is σ = 32427984000. Its totient is φ = 14960695680.

The previous prime is 22121330503. The next prime is 22121330537. The reversal of 22121330525 is 52503312122.

It is a happy number.

It is not a de Polignac number, because 22121330525 - 2²⁴ = 22104553309 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 22121330494 and 22121330503.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 608306 + ... + 643644.

It is an arithmetic number, because the mean of its divisors is an integer number (675583000).

Almost surely, 2^22121330525 is an apocalyptic number.

22121330525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22121330525 is a deficient number, since it is larger than the sum of its proper divisors (10306653475).

22121330525 is an equidigital number, since it uses as much as digits as its factorization.

22121330525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35443 (or 35424 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 26.

Adding to 22121330525 its reverse (52503312122), we get a palindrome (74624642647).

The spelling of 22121330525 in words is "twenty-two billion, one hundred twenty-one million, three hundred thirty thousand, five hundred twenty-five".