21011131102204 has 48 divisors (see below), whose sum is σ = 37007519068800. Its totient is φ = 10437775036416.

The previous prime is 21011131102193. The next prime is 21011131102333. The reversal of 21011131102204 is 40220113111012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1119211362 + ... + 1119230134.

It is an arithmetic number, because the mean of its divisors is an integer number (770989980600).

Almost surely, 2^{21011131102204} is an apocalyptic number.

It is an amenable number.

21011131102204 is a deficient number, since it is larger than the sum of its proper divisors (15996387966596).

21011131102204 is a wasteful number, since it uses less digits than its factorization.

21011131102204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21622 (or 21620 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 21011131102204 its reverse (40220113111012), we get a palindrome (61231244213216).

The spelling of 21011131102204 in words is "twenty-one trillion, eleven billion, one hundred thirty-one million, one hundred two thousand, two hundred four".