21202002099 has 8 divisors (see below), whose sum is σ = 31410373520. Its totient is φ = 14134668048.

The previous prime is 21202002083. The next prime is 21202002119. The reversal of 21202002099 is 99020020212.

It is not a de Polignac number, because 21202002099 - 2⁴ = 21202002083 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 785259337 = 21202002099 / (2 + 1 + 2 + 0 + 2 + 0 + 0 + 2 + 0 + 9 + 9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21202002049) 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, 392629642 + ... + 392629695.

It is an arithmetic number, because the mean of its divisors is an integer number (3926296690).

Almost surely, 2^21202002099 is an apocalyptic number.

21202002099 is a deficient number, since it is larger than the sum of its proper divisors (10208371421).

21202002099 is an equidigital number, since it uses as much as digits as its factorization.

21202002099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 785259346 (or 785259340 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The spelling of 21202002099 in words is "twenty-one billion, two hundred two million, two thousand, ninety-nine".