21022111110100 has 36 divisors (see below), whose sum is σ = 45618723220924. Its totient is φ = 8408707649280.

The previous prime is 21022111110097. The next prime is 21022111110131. The reversal of 21022111110100 is 101111122012.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 11721050654404 + 9301060455696 = 3423602^2 + 3049764^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4583074 + ... + 7940326.

Almost surely, 2^{21022111110100} is an apocalyptic number.

21022111110100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21022111110100 is an abundant number, since it is smaller than the sum of its proper divisors (24596612110824).

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

21022111110100 is a wasteful number, since it uses less digits than its factorization.

21022111110100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3419884 (or 3419877 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 21022111110100 its reverse (101111122012), we get a palindrome (21123222232112).

The spelling of 21022111110100 in words is "twenty-one trillion, twenty-two billion, one hundred eleven million, one hundred ten thousand, one hundred".