221223312311 has 16 divisors (see below), whose sum is σ = 230115852288. Its totient is φ = 212441764800.

The previous prime is 221223312301. The next prime is 221223312337. The reversal of 221223312311 is 113213322122.

It is a cyclic number.

It is not a de Polignac number, because 221223312311 - 2¹⁴ = 221223295927 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 (221223312301) 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, 12830066 + ... + 12847296.

It is an arithmetic number, because the mean of its divisors is an integer number (14382240768).

Almost surely, 2^221223312311 is an apocalyptic number.

221223312311 is a deficient number, since it is larger than the sum of its proper divisors (8892539977).

221223312311 is a wasteful number, since it uses less digits than its factorization.

221223312311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20422.

The product of its digits is 864, while the sum is 23.

Adding to 221223312311 its reverse (113213322122), we get a palindrome (334436634433).

The spelling of 221223312311 in words is "two hundred twenty-one billion, two hundred twenty-three million, three hundred twelve thousand, three hundred eleven".