123311212231 has 8 divisors (see below), whose sum is σ = 124010265600. Its totient is φ = 122612715960.

The previous prime is 123311212207. The next prime is 123311212249. The reversal of 123311212231 is 132212113321.

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 123311212231 - 2³¹ = 121163728583 is a prime.

It is a super-2 number, since 2×123311212231² (a number of 23 digits) 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 (123311212831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 308740 + ... + 584758.

It is an arithmetic number, because the mean of its divisors is an integer number (15501283200).

Almost surely, 2^123311212231 is an apocalyptic number.

123311212231 is a deficient number, since it is larger than the sum of its proper divisors (699053369).

123311212231 is a wasteful number, since it uses less digits than its factorization.

123311212231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278549.

The product of its digits is 432, while the sum is 22.

Adding to 123311212231 its reverse (132212113321), we get a palindrome (255523325552).

The spelling of 123311212231 in words is "one hundred twenty-three billion, three hundred eleven million, two hundred twelve thousand, two hundred thirty-one".