21122011011100 has 18 divisors (see below), whose sum is σ = 45834763894304. Its totient is φ = 8448804404400.

The previous prime is 21122011010999. The next prime is 21122011011103. The reversal of 21122011011100 is 111011022112.

It is a happy number.

It is a super-2 number, since 2×21122011011100² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21122011011103) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 105610054956 + ... + 105610055155.

Almost surely, 2^{21122011011100} is an apocalyptic number.

21122011011100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21122011011100 is an abundant number, since it is smaller than the sum of its proper divisors (24712752883204).

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

21122011011100 is a wasteful number, since it uses less digits than its factorization.

21122011011100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211220110125 (or 211220110118 counting only the distinct ones).

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

Adding to 21122011011100 its reverse (111011022112), we get a palindrome (21233022033212).

The spelling of 21122011011100 in words is "twenty-one trillion, one hundred twenty-two billion, eleven million, eleven thousand, one hundred".