201221002120986 has 24 divisors (see below), whose sum is σ = 435996870173280. Its totient is φ = 67070893182216.

The previous prime is 201221002120939. The next prime is 201221002121011. The reversal of 201221002120986 is 689021200122102.

201221002120986 is a `hidden beast` number, since 201 + 221 + 0 + 0 + 21 + 209 + 8 + 6 = 666.

It is a super-2 number, since 2×201221002120986² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 201221002120986.

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 11 ways as a sum of consecutive naturals, for example, 230735310 + ... + 231605753.

It is an arithmetic number, because the mean of its divisors is an integer number (18166536257220).

Almost surely, 2^{201221002120986} is an apocalyptic number.

201221002120986 is an abundant number, since it is smaller than the sum of its proper divisors (234775868052294).

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

201221002120986 is a wasteful number, since it uses less digits than its factorization.

201221002120986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 462365250 (or 462365247 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The spelling of 201221002120986 in words is "two hundred one trillion, two hundred twenty-one billion, two million, one hundred twenty thousand, nine hundred eighty-six".