111231312210231 has 4 divisors (see below), whose sum is σ = 148308416280312. Its totient is φ = 74154208140152.

The previous prime is 111231312210217. The next prime is 111231312210269. The reversal of 111231312210231 is 132012213132111.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 111231312210231 - 2¹⁸ = 111231311948087 is a prime.

It is a super-2 number, since 2×111231312210231² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111231312210211) 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 3 ways as a sum of consecutive naturals, for example, 18538552035036 + ... + 18538552035041.

It is an arithmetic number, because the mean of its divisors is an integer number (37077104070078).

Almost surely, 2^{111231312210231} is an apocalyptic number.

111231312210231 is a deficient number, since it is larger than the sum of its proper divisors (37077104070081).

111231312210231 is an equidigital number, since it uses as much as digits as its factorization.

111231312210231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37077104070080.

The product of its (nonzero) digits is 432, while the sum is 24.

Adding to 111231312210231 its reverse (132012213132111), we get a palindrome (243243525342342).

The spelling of 111231312210231 in words is "one hundred eleven trillion, two hundred thirty-one billion, three hundred twelve million, two hundred ten thousand, two hundred thirty-one".