21025102551204 has 48 divisors (see below), whose sum is σ = 49246422115968. Its totient is φ = 6981533299968.

The previous prime is 21025102551203. The next prime is 21025102551241. The reversal of 21025102551204 is 40215520152012.

It is not an unprimeable number, because it can be changed into a prime (21025102551203) 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, 169089984 + ... + 169214280.

It is an arithmetic number, because the mean of its divisors is an integer number (1025967127416).

Almost surely, 2^{21025102551204} is an apocalyptic number.

It is an amenable number.

21025102551204 is an abundant number, since it is smaller than the sum of its proper divisors (28221319564764).

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

21025102551204 is a wasteful number, since it uses less digits than its factorization.

21025102551204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178164 (or 178162 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 30.

The spelling of 21025102551204 in words is "twenty-one trillion, twenty-five billion, one hundred two million, five hundred fifty-one thousand, two hundred four".