221223322313121 has 16 divisors (see below), whose sum is σ = 298279704441600. Its totient is φ = 145824589392768.

The previous prime is 221223322313117. The next prime is 221223322313129. The reversal of 221223322313121 is 121313223322122.

It is a happy number.

It is not a de Polignac number, because 221223322313121 - 2² = 221223322313117 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221223322313129) 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, 82049160 + ... + 84702486.

It is an arithmetic number, because the mean of its divisors is an integer number (18642481527600).

Almost surely, 2^{221223322313121} is an apocalyptic number.

It is an amenable number.

221223322313121 is a deficient number, since it is larger than the sum of its proper divisors (77056382128479).

221223322313121 is a wasteful number, since it uses less digits than its factorization.

221223322313121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2965688.

The product of its digits is 10368, while the sum is 30.

Adding to 221223322313121 its reverse (121313223322122), we get a palindrome (342536545635243).

The spelling of 221223322313121 in words is "two hundred twenty-one trillion, two hundred twenty-three billion, three hundred twenty-two million, three hundred thirteen thousand, one hundred twenty-one".