221345222543123 has 32 divisors (see below), whose sum is σ = 276698721853440. Its totient is φ = 172671453319680.

The previous prime is 221345222543083. The next prime is 221345222543129. The reversal of 221345222543123 is 321345222543122.

It is not a de Polignac number, because 221345222543123 - 2⁶ = 221345222543059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221345222543129) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18217568 + ... + 27831101.

It is an arithmetic number, because the mean of its divisors is an integer number (8646835057920).

Almost surely, 2^{221345222543123} is an apocalyptic number.

221345222543123 is a deficient number, since it is larger than the sum of its proper divisors (55353499310317).

221345222543123 is a wasteful number, since it uses less digits than its factorization.

221345222543123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46050027.

The product of its digits is 691200, while the sum is 41.

Subtracting 221345222543123 from its reverse (321345222543122), we obtain a palindrome (99999999999999).

The spelling of 221345222543123 in words is "two hundred twenty-one trillion, three hundred forty-five billion, two hundred twenty-two million, five hundred forty-three thousand, one hundred twenty-three".