21213600125604 has 48 divisors (see below), whose sum is σ = 49758676724736. Its totient is φ = 7034019366400.

The previous prime is 21213600125591. The next prime is 21213600125609. The reversal of 21213600125604 is 40652100631212.

It is not an unprimeable number, because it can be changed into a prime (21213600125609) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 146287774 + ... + 146432714.

It is an arithmetic number, because the mean of its divisors is an integer number (1036639098432).

Almost surely, 2^{21213600125604} is an apocalyptic number.

It is an amenable number.

21213600125604 is an abundant number, since it is smaller than the sum of its proper divisors (28545076599132).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21213600125604 is a wasteful number, since it uses less digits than its factorization.

21213600125604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208996 (or 208994 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

Adding to 21213600125604 its reverse (40652100631212), we get a palindrome (61865700756816).

The spelling of 21213600125604 in words is "twenty-one trillion, two hundred thirteen billion, six hundred million, one hundred twenty-five thousand, six hundred four".