1231223223 has 4 divisors (see below), whose sum is σ = 1641630968. Its totient is φ = 820815480.

The previous prime is 1231223179. The next prime is 1231223251. The reversal of 1231223223 is 3223221321.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3223221321 = 3 ⋅1074407107.

It is not a de Polignac number, because 1231223223 - 2⁹ = 1231222711 is a prime.

It is a super-3 number, since 3×1231223223³ (a number of 28 digits) contains 333 as substring.

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 1231223223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231223023) 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, 205203868 + ... + 205203873.

It is an arithmetic number, because the mean of its divisors is an integer number (410407742).

Almost surely, 2^1231223223 is an apocalyptic number.

1231223223 is a deficient number, since it is larger than the sum of its proper divisors (410407745).

1231223223 is an equidigital number, since it uses as much as digits as its factorization.

1231223223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410407744.

The product of its digits is 864, while the sum is 21.

The square root of 1231223223 is about 35088.7905605195. The cubic root of 1231223223 is about 1071.7963313115.

Adding to 1231223223 its reverse (3223221321), we get a palindrome (4454444544).

The spelling of 1231223223 in words is "one billion, two hundred thirty-one million, two hundred twenty-three thousand, two hundred twenty-three".