21161610202 has 16 divisors (see below), whose sum is σ = 33423480000. Its totient is φ = 10020797280.

The previous prime is 21161610191. The next prime is 21161610229. The reversal of 21161610202 is 20201616112.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39174 + ... + 209422.

It is an arithmetic number, because the mean of its divisors is an integer number (2088967500).

Almost surely, 2^21161610202 is an apocalyptic number.

21161610202 is a deficient number, since it is larger than the sum of its proper divisors (12261869798).

21161610202 is a wasteful number, since it uses less digits than its factorization.

21161610202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173541.

The product of its (nonzero) digits is 288, while the sum is 22.

The spelling of 21161610202 in words is "twenty-one billion, one hundred sixty-one million, six hundred ten thousand, two hundred two".