221222422412311 has 4 divisors (see below), whose sum is σ = 221229438473224. Its totient is φ = 221215406351400.

The previous prime is 221222422412249. The next prime is 221222422412353. The reversal of 221222422412311 is 113214224222122.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 221222422412311 - 2²¹ = 221222420315159 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 (221222422416311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3507983160 + ... + 3508046221.

It is an arithmetic number, because the mean of its divisors is an integer number (55307359618306).

Almost surely, 2^{221222422412311} is an apocalyptic number.

221222422412311 is a deficient number, since it is larger than the sum of its proper divisors (7016060913).

221222422412311 is an equidigital number, since it uses as much as digits as its factorization.

221222422412311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7016060912.

The product of its digits is 12288, while the sum is 31.

Adding to 221222422412311 its reverse (113214224222122), we get a palindrome (334436646634433).

The spelling of 221222422412311 in words is "two hundred twenty-one trillion, two hundred twenty-two billion, four hundred twenty-two million, four hundred twelve thousand, three hundred eleven".