21216415602202 has 16 divisors (see below), whose sum is σ = 31902830562600. Its totient is φ = 10582139393280.

The previous prime is 21216415602199. The next prime is 21216415602259. The reversal of 21216415602202 is 20220651461212.

It can be written as a sum of positive squares in 4 ways, for example, as 21213845010801 + 2570591401 = 4605849^2 + 50701^2 .

It is an unprimeable number.

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, 127951324 + ... + 128117032.

Almost surely, 2^{21216415602202} is an apocalyptic number.

21216415602202 is a deficient number, since it is larger than the sum of its proper divisors (10686414960398).

21216415602202 is a wasteful number, since it uses less digits than its factorization.

21216415602202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322641.

The product of its (nonzero) digits is 23040, while the sum is 34.

The spelling of 21216415602202 in words is "twenty-one trillion, two hundred sixteen billion, four hundred fifteen million, six hundred two thousand, two hundred two".