21022112122100 has 36 divisors (see below), whose sum is σ = 47089531160448. Its totient is φ = 8137591788000.

The previous prime is 21022112122091. The next prime is 21022112122153. The reversal of 21022112122100 is 122121122012.

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, 3390660146 + ... + 3390666345.

Almost surely, 2^{21022112122100} is an apocalyptic number.

21022112122100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21022112122100 is an abundant number, since it is smaller than the sum of its proper divisors (26067419038348).

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

21022112122100 is a wasteful number, since it uses less digits than its factorization.

21022112122100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6781326536 (or 6781326529 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21022112122100 its reverse (122121122012), we get a palindrome (21144233244112).

The spelling of 21022112122100 in words is "twenty-one trillion, twenty-two billion, one hundred twelve million, one hundred twenty-two thousand, one hundred".