123211100031307 has 4 divisors (see below), whose sum is σ = 123212044474576. Its totient is φ = 123210155588040.

The previous prime is 123211100031293. The next prime is 123211100031431. The reversal of 123211100031307 is 703130001112321.

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-123211100031307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123211100038307) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 472025919 + ... + 472286872.

It is an arithmetic number, because the mean of its divisors is an integer number (30803011118644).

Almost surely, 2^{123211100031307} is an apocalyptic number.

123211100031307 is a deficient number, since it is larger than the sum of its proper divisors (944443269).

123211100031307 is an equidigital number, since it uses as much as digits as its factorization.

123211100031307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 944443268.

The product of its (nonzero) digits is 756, while the sum is 25.

Adding to 123211100031307 its reverse (703130001112321), we get a palindrome (826341101143628).

The spelling of 123211100031307 in words is "one hundred twenty-three trillion, two hundred eleven billion, one hundred million, thirty-one thousand, three hundred seven".