1223123231 has 8 divisors (see below), whose sum is σ = 1347528528. Its totient is φ = 1100920000.

The previous prime is 1223123203. The next prime is 1223123243. The reversal of 1223123231 is 1323213221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1223123231 - 2²⁶ = 1156014367 is a prime.

It is a super-2 number, since 2×1223123231² = 2992060876423758722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223123201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 549350 + ... + 551571.

It is an arithmetic number, because the mean of its divisors is an integer number (168441066).

Almost surely, 2^1223123231 is an apocalyptic number.

1223123231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1223123231 is a deficient number, since it is larger than the sum of its proper divisors (124405297).

1223123231 is a wasteful number, since it uses less digits than its factorization.

1223123231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1101033.

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

The square root of 1223123231 is about 34973.1787374268. The cubic root of 1223123231 is about 1069.4407742454.

Adding to 1223123231 its reverse (1323213221), we get a palindrome (2546336452).

The spelling of 1223123231 in words is "one billion, two hundred twenty-three million, one hundred twenty-three thousand, two hundred thirty-one".