21201219983 has 8 divisors (see below), whose sum is σ = 21635898000. Its totient is φ = 20770440768.

The previous prime is 21201219953. The next prime is 21201219997. The reversal of 21201219983 is 38991210212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21201219983 - 2²² = 21197025679 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 (21201219953) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 963713 + ... + 985466.

It is an arithmetic number, because the mean of its divisors is an integer number (2704487250).

Almost surely, 2^21201219983 is an apocalyptic number.

21201219983 is a deficient number, since it is larger than the sum of its proper divisors (434678017).

21201219983 is a wasteful number, since it uses less digits than its factorization.

21201219983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1949401.

The product of its (nonzero) digits is 15552, while the sum is 38.

The spelling of 21201219983 in words is "twenty-one billion, two hundred one million, two hundred nineteen thousand, nine hundred eighty-three".