21100311204 has 36 divisors (see below), whose sum is σ = 57272274864. Its totient is φ = 6028660176.

The previous prime is 21100311203. The next prime is 21100311229. The reversal of 21100311204 is 40211300112.

It is not an unprimeable number, because it can be changed into a prime (21100311203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17941854 + ... + 17943029.

It is an arithmetic number, because the mean of its divisors is an integer number (1590896524).

Almost surely, 2^21100311204 is an apocalyptic number.

It is an amenable number.

21100311204 is an abundant number, since it is smaller than the sum of its proper divisors (36171963660).

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

21100311204 is a wasteful number, since it uses less digits than its factorization.

21100311204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35884904 (or 35884895 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 21100311204 its reverse (40211300112), we get a palindrome (61311611316).

The spelling of 21100311204 in words is "twenty-one billion, one hundred million, three hundred eleven thousand, two hundred four".