21601673422200 has 144 divisors (see below), whose sum is σ = 75232494890280. Its totient is φ = 5760446232960.

The previous prime is 21601673422139. The next prime is 21601673422271. The reversal of 21601673422200 is 222437610612.

21601673422200 is a `hidden beast` number, since 2 + 1 + 601 + 6 + 7 + 3 + 4 + 22 + 20 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 222190839 + ... + 222288038.

Almost surely, 2^{21601673422200} is an apocalyptic number.

21601673422200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21601673422200 is an abundant number, since it is smaller than the sum of its proper divisors (53630821468080).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21601673422200 is a wasteful number, since it uses less digits than its factorization.

21601673422200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444478908 (or 444478887 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 36.

The spelling of 21601673422200 in words is "twenty-one trillion, six hundred one billion, six hundred seventy-three million, four hundred twenty-two thousand, two hundred".