221079120138201 has 32 divisors (see below), whose sum is σ = 319582530892800. Its totient is φ = 135133465814784.

The previous prime is 221079120138133. The next prime is 221079120138241. The reversal of 221079120138201 is 102831021970122.

It is not a de Polignac number, because 221079120138201 - 2³³ = 221070530203609 is a prime.

It is a super-2 number, since 2×221079120138201² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 221079120138201.

It is not an unprimeable number, because it can be changed into a prime (221079120138241) 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, 414947160 + ... + 415479606.

It is an arithmetic number, because the mean of its divisors is an integer number (9986954090400).

Almost surely, 2^{221079120138201} is an apocalyptic number.

It is an amenable number.

221079120138201 is a deficient number, since it is larger than the sum of its proper divisors (98503410754599).

221079120138201 is a wasteful number, since it uses less digits than its factorization.

221079120138201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 604065.

The product of its (nonzero) digits is 24192, while the sum is 39.

The spelling of 221079120138201 in words is "two hundred twenty-one trillion, seventy-nine billion, one hundred twenty million, one hundred thirty-eight thousand, two hundred one".