221001301231 has 16 divisors (see below), whose sum is σ = 234606855168. Its totient is φ = 207463680000.

The previous prime is 221001301207. The next prime is 221001301259. The reversal of 221001301231 is 132103100122.

It is a cyclic number.

It is not a de Polignac number, because 221001301231 - 2¹⁹ = 221000776943 is a prime.

It is a super-2 number, since 2×221001301231² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221001301271) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 11750371 + ... + 11769163.

It is an arithmetic number, because the mean of its divisors is an integer number (14662928448).

Almost surely, 2^221001301231 is an apocalyptic number.

221001301231 is a deficient number, since it is larger than the sum of its proper divisors (13605553937).

221001301231 is a wasteful number, since it uses less digits than its factorization.

221001301231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20562.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 221001301231 its reverse (132103100122), we get a palindrome (353104401353).

The spelling of 221001301231 in words is "two hundred twenty-one billion, one million, three hundred one thousand, two hundred thirty-one".