22521002125 has 24 divisors (see below), whose sum is σ = 28450007352. Its totient is φ = 17799051200.

The previous prime is 22521002117. The next prime is 22521002131. The reversal of 22521002125 is 52120012522.

It can be written as a sum of positive squares in 4 ways, for example, as 3833838724 + 18687163401 = 61918^2 + 136701^2 .

It is not a de Polignac number, because 22521002125 - 2³ = 22521002117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22521002096 and 22521002105.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 848049 + ... + 874201.

It is an arithmetic number, because the mean of its divisors is an integer number (1185416973).

Almost surely, 2^22521002125 is an apocalyptic number.

22521002125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22521002125 is a deficient number, since it is larger than the sum of its proper divisors (5929005227).

22521002125 is an frugal number, since it uses more digits than its factorization.

22521002125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26334 (or 26241 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 22.

Adding to 22521002125 its reverse (52120012522), we get a palindrome (74641014647).

The spelling of 22521002125 in words is "twenty-two billion, five hundred twenty-one million, two thousand, one hundred twenty-five".