123211231 has 8 divisors (see below), whose sum is σ = 144751824. Its totient is φ = 103393920.

The previous prime is 123211201. The next prime is 123211241. The reversal of 123211231 is 132112321.

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 123211231 - 2⁹ = 123210719 is a prime.

It is a super-2 number, since 2×123211231² = 30362014889070722, 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 (123211201) 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, 430666 + ... + 430951.

It is an arithmetic number, because the mean of its divisors is an integer number (18093978).

Almost surely, 2^123211231 is an apocalyptic number.

123211231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

123211231 is a deficient number, since it is larger than the sum of its proper divisors (21540593).

123211231 is a wasteful number, since it uses less digits than its factorization.

123211231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 861641.

The product of its digits is 72, while the sum is 16.

The square root of 123211231 is about 11100.0554503119. The cubic root of 123211231 is about 497.6035066573.

Adding to 123211231 its reverse (132112321), we get a palindrome (255323552).

It can be divided in two parts, 1 and 23211231, that added together give a palindrome (23211232).

The spelling of 123211231 in words is "one hundred twenty-three million, two hundred eleven thousand, two hundred thirty-one".