21331213983 has 12 divisors (see below), whose sum is σ = 30813157648. Its totient is φ = 14220161280.

The previous prime is 21331213973. The next prime is 21331214017. The reversal of 21331213983 is 38931213312.

It is a happy number.

21331213983 is a `hidden beast` number, since 21 + 331 + 213 + 98 + 3 = 666.

It is not a de Polignac number, because 21331213983 - 2⁸ = 21331213727 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21331213903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 236991 + ... + 314367.

Almost surely, 2^21331213983 is an apocalyptic number.

21331213983 is a deficient number, since it is larger than the sum of its proper divisors (9481943665).

21331213983 is a wasteful number, since it uses less digits than its factorization.

21331213983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108014 (or 108011 counting only the distinct ones).

The product of its digits is 23328, while the sum is 36.

The spelling of 21331213983 in words is "twenty-one billion, three hundred thirty-one million, two hundred thirteen thousand, nine hundred eighty-three".