221013123023 has 16 divisors (see below), whose sum is σ = 276162566400. Its totient is φ = 171834432000.

The previous prime is 221013122999. The next prime is 221013123029. The reversal of 221013123023 is 320321310122.

It is not a de Polignac number, because 221013123023 - 2¹⁸ = 221012860879 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221013122986 and 221013123004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221013123029) 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, 3161753 + ... + 3230898.

It is an arithmetic number, because the mean of its divisors is an integer number (17260160400).

Almost surely, 2^221013123023 is an apocalyptic number.

221013123023 is a deficient number, since it is larger than the sum of its proper divisors (55149443377).

221013123023 is a wasteful number, since it uses less digits than its factorization.

221013123023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6393118.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 221013123023 its reverse (320321310122), we get a palindrome (541334433145).

The spelling of 221013123023 in words is "two hundred twenty-one billion, thirteen million, one hundred twenty-three thousand, twenty-three".