22121555025 has 12 divisors (see below), whose sum is σ = 36574304432. Its totient is φ = 11798162640.

The previous prime is 22121555009. The next prime is 22121555039. The reversal of 22121555025 is 52055512122.

It is not a de Polignac number, because 22121555025 - 2⁴ = 22121555009 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22121554983 and 22121555001.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 147476959 + ... + 147477108.

Almost surely, 2^22121555025 is an apocalyptic number.

22121555025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22121555025 is a deficient number, since it is larger than the sum of its proper divisors (14452749407).

22121555025 is a wasteful number, since it uses less digits than its factorization.

22121555025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294954080 (or 294954075 counting only the distinct ones).

The product of its (nonzero) digits is 10000, while the sum is 30.

The spelling of 22121555025 in words is "twenty-two billion, one hundred twenty-one million, five hundred fifty-five thousand, twenty-five".