21200102309 has 8 divisors (see below), whose sum is σ = 21292477920. Its totient is φ = 21107790000.

The previous prime is 21200102299. The next prime is 21200102311. The reversal of 21200102309 is 90320100212.

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 21200102309 - 2⁴ = 21200102293 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 (21200102369) 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 7 ways as a sum of consecutive naturals, for example, 731507 + ... + 759935.

It is an arithmetic number, because the mean of its divisors is an integer number (2661559740).

Almost surely, 2^21200102309 is an apocalyptic number.

It is an amenable number.

21200102309 is a deficient number, since it is larger than the sum of its proper divisors (92375611).

21200102309 is a wasteful number, since it uses less digits than its factorization.

21200102309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31651.

The product of its (nonzero) digits is 216, while the sum is 20.

The spelling of 21200102309 in words is "twenty-one billion, two hundred million, one hundred two thousand, three hundred nine".