21021020002204 has 24 divisors (see below), whose sum is σ = 36932204786400. Its totient is φ = 10468973497344.

The previous prime is 21021020002193. The next prime is 21021020002231. The reversal of 21021020002204 is 40220002012012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5522772 + ... + 8517220.

It is an arithmetic number, because the mean of its divisors is an integer number (1538841866100).

Almost surely, 2^{21021020002204} is an apocalyptic number.

It is an amenable number.

21021020002204 is a deficient number, since it is larger than the sum of its proper divisors (15911184784196).

21021020002204 is a wasteful number, since it uses less digits than its factorization.

21021020002204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3001389 (or 3001387 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 21021020002204 its reverse (40220002012012), we get a palindrome (61241022014216).

The spelling of 21021020002204 in words is "twenty-one trillion, twenty-one billion, twenty million, two thousand, two hundred four".