221331213023 has 4 divisors (see below), whose sum is σ = 234350696160. Its totient is φ = 208311729888.

The previous prime is 221331213011. The next prime is 221331213041. The reversal of 221331213023 is 320312133122.

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 221331213023 - 2³⁶ = 152611736287 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 221331213023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221331213823) 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, 6509741543 + ... + 6509741576.

It is an arithmetic number, because the mean of its divisors is an integer number (58587674040).

Almost surely, 2^221331213023 is an apocalyptic number.

221331213023 is a deficient number, since it is larger than the sum of its proper divisors (13019483137).

221331213023 is a wasteful number, since it uses less digits than its factorization.

221331213023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13019483136.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 221331213023 its reverse (320312133122), we get a palindrome (541643346145).

The spelling of 221331213023 in words is "two hundred twenty-one billion, three hundred thirty-one million, two hundred thirteen thousand, twenty-three".