221231223093 has 4 divisors (see below), whose sum is σ = 294974964128. Its totient is φ = 147487482060.

The previous prime is 221231223071. The next prime is 221231223097. The reversal of 221231223093 is 390322132122.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 221231223093 - 2¹³ = 221231214901 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 221231223093.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221231223097) 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, 36871870513 + ... + 36871870518.

It is an arithmetic number, because the mean of its divisors is an integer number (73743741032).

Almost surely, 2^221231223093 is an apocalyptic number.

It is an amenable number.

221231223093 is a deficient number, since it is larger than the sum of its proper divisors (73743741035).

221231223093 is an equidigital number, since it uses as much as digits as its factorization.

221231223093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73743741034.

The product of its (nonzero) digits is 7776, while the sum is 30.

The spelling of 221231223093 in words is "two hundred twenty-one billion, two hundred thirty-one million, two hundred twenty-three thousand, ninety-three".