21333131112 has 32 divisors (see below), whose sum is σ = 53672536800. Its totient is φ = 7065749184.

The previous prime is 21333131101. The next prime is 21333131153. The reversal of 21333131112 is 21113133312.

It is a happy number.

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

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2827062 + ... + 2834597.

It is an arithmetic number, because the mean of its divisors is an integer number (1677266775).

Almost surely, 2^21333131112 is an apocalyptic number.

It is an amenable number.

21333131112 is an abundant number, since it is smaller than the sum of its proper divisors (32339405688).

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

21333131112 is a wasteful number, since it uses less digits than its factorization.

21333131112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5661825 (or 5661821 counting only the distinct ones).

The product of its digits is 324, while the sum is 21.

Adding to 21333131112 its reverse (21113133312), we get a palindrome (42446264424).

The spelling of 21333131112 in words is "twenty-one billion, three hundred thirty-three million, one hundred thirty-one thousand, one hundred twelve".