221123100023 has 16 divisors (see below), whose sum is σ = 263356108800. Its totient is φ = 185501432088.

The previous prime is 221123100017. The next prime is 221123100031. The reversal of 221123100023 is 320001321122.

It is not a de Polignac number, because 221123100023 - 2⁶ = 221123099959 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221123099974 and 221123100010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221123100823) 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, 6842111 + ... + 6874352.

It is an arithmetic number, because the mean of its divisors is an integer number (16459756800).

Almost surely, 2^221123100023 is an apocalyptic number.

221123100023 is a deficient number, since it is larger than the sum of its proper divisors (42233008777).

221123100023 is an equidigital number, since it uses as much as digits as its factorization.

221123100023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13716531 (or 13716517 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 221123100023 its reverse (320001321122), we get a palindrome (541124421145).

The spelling of 221123100023 in words is "two hundred twenty-one billion, one hundred twenty-three million, one hundred thousand, twenty-three".