21133313112 has 16 divisors (see below), whose sum is σ = 52833282840. Its totient is φ = 7044437696.

The previous prime is 21133313083. The next prime is 21133313137. The reversal of 21133313112 is 21131333112.

It is a happy number.

It is a super-2 number, since 2×21133313112² (a number of 21 digits) contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 440277333 + ... + 440277380.

Almost surely, 2^21133313112 is an apocalyptic number.

It is an amenable number.

21133313112 is an abundant number, since it is smaller than the sum of its proper divisors (31699969728).

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

21133313112 is a wasteful number, since it uses less digits than its factorization.

21133313112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 880554722 (or 880554718 counting only the distinct ones).

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

Adding to 21133313112 its reverse (21131333112), we get a palindrome (42264646224).

The spelling of 21133313112 in words is "twenty-one billion, one hundred thirty-three million, three hundred thirteen thousand, one hundred twelve".