21000220002099 has 24 divisors (see below), whose sum is σ = 34588597653792. Its totient is φ = 12163023348480.

The previous prime is 21000220002079. The next prime is 21000220002119. The reversal of 21000220002099 is 99020002200012.

It is an interprime number because it is at equal distance from previous prime (21000220002079) and next prime (21000220002119).

It is not a de Polignac number, because 21000220002099 - 2¹⁷ = 21000219871027 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21000220002029) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5279088007 + ... + 5279091984.

It is an arithmetic number, because the mean of its divisors is an integer number (1441191568908).

Almost surely, 2^{21000220002099} is an apocalyptic number.

21000220002099 is a deficient number, since it is larger than the sum of its proper divisors (13588377651693).

21000220002099 is a wasteful number, since it uses less digits than its factorization.

21000220002099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10558180027 (or 10558180024 counting only the distinct ones).

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

The spelling of 21000220002099 in words is "twenty-one trillion, two hundred twenty million, two thousand, ninety-nine".