120537541165221 has 96 divisors (see below), whose sum is σ = 185877753384960. Its totient is φ = 75054910791168.

The previous prime is 120537541165189. The next prime is 120537541165231. The reversal of 120537541165221 is 122561145735021.

120537541165221 is a `hidden beast` number, since 1 + 2 + 0 + 5 + 3 + 7 + 5 + 4 + 116 + 522 + 1 = 666.

It is not a de Polignac number, because 120537541165221 - 2⁵ = 120537541165189 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120537541165231) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 5528473306 + ... + 5528495108.

It is an arithmetic number, because the mean of its divisors is an integer number (1936226597760).

Almost surely, 2^{120537541165221} is an apocalyptic number.

It is an amenable number.

120537541165221 is a deficient number, since it is larger than the sum of its proper divisors (65340212219739).

120537541165221 is a wasteful number, since it uses less digits than its factorization.

120537541165221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23447 (or 23444 counting only the distinct ones).

The product of its (nonzero) digits is 504000, while the sum is 45.

The spelling of 120537541165221 in words is "one hundred twenty trillion, five hundred thirty-seven billion, five hundred forty-one million, one hundred sixty-five thousand, two hundred twenty-one".