21103533311204 has 24 divisors (see below), whose sum is σ = 36959948339328. Its totient is φ = 10543548807360.

The previous prime is 21103533311171. The next prime is 21103533311213. The reversal of 21103533311204 is 40211333530112.

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, 133290872 + ... + 133449104.

It is an arithmetic number, because the mean of its divisors is an integer number (1539997847472).

Almost surely, 2^{21103533311204} is an apocalyptic number.

It is an amenable number.

21103533311204 is a deficient number, since it is larger than the sum of its proper divisors (15856415028124).

21103533311204 is a wasteful number, since it uses less digits than its factorization.

21103533311204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183995 (or 183993 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 29.

Adding to 21103533311204 its reverse (40211333530112), we get a palindrome (61314866841316).

The spelling of 21103533311204 in words is "twenty-one trillion, one hundred three billion, five hundred thirty-three million, three hundred eleven thousand, two hundred four".