21569800223871 has 32 divisors (see below), whose sum is σ = 32200035690240. Its totient is φ = 14269723322400.

The previous prime is 21569800223861. The next prime is 21569800223887. The reversal of 21569800223871 is 17832200896512.

21569800223871 is a `hidden beast` number, since 2 + 1 + 569 + 8 + 0 + 0 + 2 + 2 + 3 + 8 + 71 = 666.

It is not a de Polignac number, because 21569800223871 - 2⁷ = 21569800223743 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21569800223861) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 223953601 + ... + 224049893.

It is an arithmetic number, because the mean of its divisors is an integer number (1006251115320).

Almost surely, 2^{21569800223871} is an apocalyptic number.

21569800223871 is a deficient number, since it is larger than the sum of its proper divisors (10630235466369).

21569800223871 is a wasteful number, since it uses less digits than its factorization.

21569800223871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159764 (or 159758 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 54.

The spelling of 21569800223871 in words is "twenty-one trillion, five hundred sixty-nine billion, eight hundred million, two hundred twenty-three thousand, eight hundred seventy-one".