21022212123100 has 36 divisors (see below), whose sum is σ = 45847437538000. Its totient is φ = 8366629138560.

The previous prime is 21022212123097. The next prime is 21022212123131. The reversal of 21022212123100 is 132121222012.

It is a super-2 number, since 2×21022212123100² (a number of 27 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 11 ways as a sum of consecutive naturals, for example, 528176385 + ... + 528216184.

Almost surely, 2^{21022212123100} is an apocalyptic number.

21022212123100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21022212123100 is an abundant number, since it is smaller than the sum of its proper divisors (24825225414900).

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

21022212123100 is a wasteful number, since it uses less digits than its factorization.

21022212123100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1056392782 (or 1056392775 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 21022212123100 its reverse (132121222012), we get a palindrome (21154333345112).

The spelling of 21022212123100 in words is "twenty-one trillion, twenty-two billion, two hundred twelve million, one hundred twenty-three thousand, one hundred".