21133102012 has 12 divisors (see below), whose sum is σ = 40345013016. Its totient is φ = 9605955440.

The previous prime is 21133102009. The next prime is 21133102037. The reversal of 21133102012 is 21020133112.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 240148843 + ... + 240148930.

It is an arithmetic number, because the mean of its divisors is an integer number (3362084418).

Almost surely, 2^21133102012 is an apocalyptic number.

21133102012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21133102012 is a deficient number, since it is larger than the sum of its proper divisors (19211911004).

21133102012 is a wasteful number, since it uses less digits than its factorization.

21133102012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 480297788 (or 480297786 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 21133102012 its reverse (21020133112), we get a palindrome (42153235124).

The spelling of 21133102012 in words is "twenty-one billion, one hundred thirty-three million, one hundred two thousand, twelve".