221111320221231 has 8 divisors (see below), whose sum is σ = 321616465776384. Its totient is φ = 134006860740120.

The previous prime is 221111320221227. The next prime is 221111320221247. The reversal of 221111320221231 is 132122023111122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 221111320221231 - 2² = 221111320221227 is a prime.

It is a super-2 number, since 2×221111320221231² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221111320221131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3350171518471 + ... + 3350171518536.

It is an arithmetic number, because the mean of its divisors is an integer number (40202058222048).

Almost surely, 2^{221111320221231} is an apocalyptic number.

221111320221231 is a deficient number, since it is larger than the sum of its proper divisors (100505145555153).

221111320221231 is a wasteful number, since it uses less digits than its factorization.

221111320221231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6700343037021.

The product of its (nonzero) digits is 576, while the sum is 24.

Adding to 221111320221231 its reverse (132122023111122), we get a palindrome (353233343332353).

The spelling of 221111320221231 in words is "two hundred twenty-one trillion, one hundred eleven billion, three hundred twenty million, two hundred twenty-one thousand, two hundred thirty-one".