231311031123 has 8 divisors (see below), whose sum is σ = 308425390336. Its totient is φ = 154202013000.

The previous prime is 231311031101. The next prime is 231311031169. The reversal of 231311031123 is 321130113132.

It is a happy number.

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

It is not a de Polignac number, because 231311031123 - 2¹⁰ = 231311030099 is a prime.

It is a super-2 number, since 2×231311031123² (a number of 24 digits) contains 22 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 231311031123.

It is not an unprimeable number, because it can be changed into a prime (231311031323) 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, 1233103 + ... + 1408248.

It is an arithmetic number, because the mean of its divisors is an integer number (38553173792).

Almost surely, 2^231311031123 is an apocalyptic number.

231311031123 is a deficient number, since it is larger than the sum of its proper divisors (77114359213).

231311031123 is a wasteful number, since it uses less digits than its factorization.

231311031123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2670545.

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 231311031123 its reverse (321130113132), we get a palindrome (552441144255).

The spelling of 231311031123 in words is "two hundred thirty-one billion, three hundred eleven million, thirty-one thousand, one hundred twenty-three".