21211675325 has 12 divisors (see below), whose sum is σ = 26914164288. Its totient is φ = 16574703600.

The previous prime is 21211675249. The next prime is 21211675379. The reversal of 21211675325 is 52357611212.

It is not a de Polignac number, because 21211675325 - 2¹⁶ = 21211609789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9864821 + ... + 9866970.

It is an arithmetic number, because the mean of its divisors is an integer number (2242847024).

Almost surely, 2^21211675325 is an apocalyptic number.

21211675325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21211675325 is a deficient number, since it is larger than the sum of its proper divisors (5702488963).

21211675325 is a wasteful number, since it uses less digits than its factorization.

21211675325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19731844 (or 19731839 counting only the distinct ones).

The product of its digits is 25200, while the sum is 35.

The spelling of 21211675325 in words is "twenty-one billion, two hundred eleven million, six hundred seventy-five thousand, three hundred twenty-five".