221231312233311 has 16 divisors (see below), whose sum is σ = 298280028284000. Its totient is φ = 145837762357248.

The previous prime is 221231312233289. The next prime is 221231312233339. The reversal of 221231312233311 is 113332213132122.

It is a happy number.

It is not a de Polignac number, because 221231312233311 - 2¹⁷ = 221231312102239 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221231312233411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 336361036 + ... + 337018113.

It is an arithmetic number, because the mean of its divisors is an integer number (18642501767750).

Almost surely, 2^{221231312233311} is an apocalyptic number.

221231312233311 is a deficient number, since it is larger than the sum of its proper divisors (77048716050689).

221231312233311 is a wasteful number, since it uses less digits than its factorization.

221231312233311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 673380378.

The product of its digits is 7776, while the sum is 30.

Adding to 221231312233311 its reverse (113332213132122), we get a palindrome (334563525365433).

The spelling of 221231312233311 in words is "two hundred twenty-one trillion, two hundred thirty-one billion, three hundred twelve million, two hundred thirty-three thousand, three hundred eleven".