21133111122 has 24 divisors (see below), whose sum is σ = 47265454080. Its totient is φ = 6817132440.

The previous prime is 21133111063. The next prime is 21133111127. The reversal of 21133111122 is 22111133112.

21133111122 is a `hidden beast` number, since 211 + 331 + 1 + 1 + 122 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 21133111095 and 21133111104.

It is not an unprimeable number, because it can be changed into a prime (21133111127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18935922 + ... + 18937037.

It is an arithmetic number, because the mean of its divisors is an integer number (1969393920).

Almost surely, 2^21133111122 is an apocalyptic number.

21133111122 is an abundant number, since it is smaller than the sum of its proper divisors (26132342958).

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

21133111122 is a wasteful number, since it uses less digits than its factorization.

21133111122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37872998 (or 37872995 counting only the distinct ones).

The product of its digits is 72, while the sum is 18.

Adding to 21133111122 its reverse (22111133112), we get a palindrome (43244244234).

The spelling of 21133111122 in words is "twenty-one billion, one hundred thirty-three million, one hundred eleven thousand, one hundred twenty-two".