21331010112 has 28 divisors (see below), whose sum is σ = 56438298096. Its totient is φ = 7110336640.

The previous prime is 21331010111. The next prime is 21331010143. The reversal of 21331010112 is 21101013312.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21331010091 and 21331010100.

It is not an unprimeable number, because it can be changed into a prime (21331010111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55549314 + ... + 55549697.

Almost surely, 2^21331010112 is an apocalyptic number.

It is an amenable number.

21331010112 is an abundant number, since it is smaller than the sum of its proper divisors (35107287984).

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

21331010112 is a wasteful number, since it uses less digits than its factorization.

21331010112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111099026 (or 111099016 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 21331010112 its reverse (21101013312), we get a palindrome (42432023424).

It can be divided in two parts, 21 and 331010112, that added together give a palindrome (331010133).

The spelling of 21331010112 in words is "twenty-one billion, three hundred thirty-one million, ten thousand, one hundred twelve".