221522225123 has 4 divisors (see below), whose sum is σ = 221873291088. Its totient is φ = 221171159160.

The previous prime is 221522225087. The next prime is 221522225129. The reversal of 221522225123 is 321522225122.

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 221522225123 - 2¹² = 221522221027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221522225129) 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, 175532036 + ... + 175533297.

It is an arithmetic number, because the mean of its divisors is an integer number (55468322772).

Almost surely, 2^221522225123 is an apocalyptic number.

221522225123 is a deficient number, since it is larger than the sum of its proper divisors (351065965).

221522225123 is an equidigital number, since it uses as much as digits as its factorization.

221522225123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351065964.

The product of its digits is 9600, while the sum is 29.

Subtracting 221522225123 from its reverse (321522225122), we obtain a palindrome (99999999999).

The spelling of 221522225123 in words is "two hundred twenty-one billion, five hundred twenty-two million, two hundred twenty-five thousand, one hundred twenty-three".