21201022199 has 8 divisors (see below), whose sum is σ = 25065248160. Its totient is φ = 17545673376.

The previous prime is 21201022147. The next prime is 21201022229. The reversal of 21201022199 is 99122010212.

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

It is not a de Polignac number, because 21201022199 - 2⁸ = 21201021943 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21201022699) 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, 52219064 + ... + 52219469.

It is an arithmetic number, because the mean of its divisors is an integer number (3133156020).

Almost surely, 2^21201022199 is an apocalyptic number.

21201022199 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

21201022199 is a deficient number, since it is larger than the sum of its proper divisors (3864225961).

21201022199 is a wasteful number, since it uses less digits than its factorization.

21201022199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104438569.

The product of its (nonzero) digits is 1296, while the sum is 29.

The spelling of 21201022199 in words is "twenty-one billion, two hundred one million, twenty-two thousand, one hundred ninety-nine".