201221002120985 has 32 divisors (see below), whose sum is σ = 301997202170112. Its totient is φ = 125040770138880.

The previous prime is 201221002120939. The next prime is 201221002121011. The reversal of 201221002120985 is 589021200122102.

It is a happy number.

It is not a de Polignac number, because 201221002120985 - 2²² = 201220997926681 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Duffinian number.

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 31 ways as a sum of consecutive naturals, for example, 824250122 + ... + 824494211.

It is an arithmetic number, because the mean of its divisors is an integer number (9437412567816).

Almost surely, 2^{201221002120985} is an apocalyptic number.

It is an amenable number.

201221002120985 is a deficient number, since it is larger than the sum of its proper divisors (100776200049127).

201221002120985 is a wasteful number, since it uses less digits than its factorization.

201221002120985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1648744673.

The product of its (nonzero) digits is 11520, while the sum is 35.

The spelling of 201221002120985 in words is "two hundred one trillion, two hundred twenty-one billion, two million, one hundred twenty thousand, nine hundred eighty-five".