221232120331201 has 48 divisors (see below), whose sum is σ = 268821727858944. Its totient is φ = 181193210706816.

The previous prime is 221232120331139. The next prime is 221232120331217. The reversal of 221232120331201 is 102133021232122.

It is a de Polignac number, because none of the positive numbers 2^k-221232120331201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221232120331301) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7249456195 + ... + 7249486711.

It is an arithmetic number, because the mean of its divisors is an integer number (5600452663728).

Almost surely, 2^{221232120331201} is an apocalyptic number.

It is an amenable number.

221232120331201 is a deficient number, since it is larger than the sum of its proper divisors (47589607527743).

221232120331201 is a wasteful number, since it uses less digits than its factorization.

221232120331201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37070 (or 37063 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 221232120331201 its reverse (102133021232122), we get a palindrome (323365141563323).

The spelling of 221232120331201 in words is "two hundred twenty-one trillion, two hundred thirty-two billion, one hundred twenty million, three hundred thirty-one thousand, two hundred one".