21122112021100 has 36 divisors (see below), whose sum is σ = 46519087325704. Its totient is φ = 8322742644480.

The previous prime is 21122112021077. The next prime is 21122112021119. The reversal of 21122112021100 is 112021122112.

It is a super-2 number, since 2×21122112021100² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1576270317 + ... + 1576283716.

Almost surely, 2^{21122112021100} is an apocalyptic number.

21122112021100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21122112021100 is an abundant number, since it is smaller than the sum of its proper divisors (25396975304604).

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

21122112021100 is a wasteful number, since it uses less digits than its factorization.

21122112021100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3152554114 (or 3152554107 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21122112021100 its reverse (112021122112), we get a palindrome (21234133143212).

The spelling of 21122112021100 in words is "twenty-one trillion, one hundred twenty-two billion, one hundred twelve million, twenty-one thousand, one hundred".