21133304412 has 24 divisors (see below), whose sum is σ = 53793866112. Its totient is φ = 6404031600.

The previous prime is 21133304399. The next prime is 21133304419. The reversal of 21133304412 is 21440333112.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21133304419) 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 7 ways as a sum of consecutive naturals, for example, 80050264 + ... + 80050527.

It is an arithmetic number, because the mean of its divisors is an integer number (2241411088).

Almost surely, 2^21133304412 is an apocalyptic number.

21133304412 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21133304412 is an abundant number, since it is smaller than the sum of its proper divisors (32660561700).

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

21133304412 is a wasteful number, since it uses less digits than its factorization.

21133304412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160100809 (or 160100807 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 21133304412 its reverse (21440333112), we get a palindrome (42573637524).

The spelling of 21133304412 in words is "twenty-one billion, one hundred thirty-three million, three hundred four thousand, four hundred twelve".