100231312031 has 4 divisors (see below), whose sum is σ = 103687564200. Its totient is φ = 96775059864.

The previous prime is 100231312021. The next prime is 100231312033. The reversal of 100231312031 is 130213132001.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100231312031 is a prime.

It is a super-2 number, since 2×100231312031² (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 (100231312033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1728126041 + ... + 1728126098.

It is an arithmetic number, because the mean of its divisors is an integer number (25921891050).

Almost surely, 2^100231312031 is an apocalyptic number.

100231312031 is a deficient number, since it is larger than the sum of its proper divisors (3456252169).

100231312031 is an equidigital number, since it uses as much as digits as its factorization.

100231312031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3456252168.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 100231312031 its reverse (130213132001), we get a palindrome (230444444032).

The spelling of 100231312031 in words is "one hundred billion, two hundred thirty-one million, three hundred twelve thousand, thirty-one".