21122101204 has 12 divisors (see below), whose sum is σ = 36965224800. Its totient is φ = 10560608408.

The previous prime is 21122101199. The next prime is 21122101211. The reversal of 21122101204 is 40210122112.

It is a super-2 number, since 2×21122101204² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12027 + ... + 205885.

It is an arithmetic number, because the mean of its divisors is an integer number (3080435400).

Almost surely, 2^21122101204 is an apocalyptic number.

It is an amenable number.

21122101204 is a deficient number, since it is larger than the sum of its proper divisors (15843123596).

21122101204 is a wasteful number, since it uses less digits than its factorization.

21122101204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221102 (or 221100 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21122101204 its reverse (40210122112), we get a palindrome (61332223316).

The spelling of 21122101204 in words is "twenty-one billion, one hundred twenty-two million, one hundred one thousand, two hundred four".