221013121323 has 8 divisors (see below), whose sum is σ = 294693987328. Its totient is φ = 147337168104.

The previous prime is 221013121309. The next prime is 221013121327. The reversal of 221013121323 is 323121310122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 221013121323 - 2⁵ = 221013121291 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221013121323.

It is not an unprimeable number, because it can be changed into a prime (221013121327) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1121911 + ... + 1304112.

It is an arithmetic number, because the mean of its divisors is an integer number (36836748416).

Almost surely, 2^221013121323 is an apocalyptic number.

221013121323 is a deficient number, since it is larger than the sum of its proper divisors (73680866005).

221013121323 is a wasteful number, since it uses less digits than its factorization.

221013121323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2456393.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 221013121323 its reverse (323121310122), we get a palindrome (544134431445).

The spelling of 221013121323 in words is "two hundred twenty-one billion, thirteen million, one hundred twenty-one thousand, three hundred twenty-three".