31032101123 has 4 divisors (see below), whose sum is σ = 31038769320. Its totient is φ = 31025432928.

The previous prime is 31032101099. The next prime is 31032101141. The reversal of 31032101123 is 32110123013.

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 31032101123 - 2⁸ = 31032100867 is a prime.

It is a super-2 number, since 2×31032101123² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31032101143) 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, 3327113 + ... + 3336426.

It is an arithmetic number, because the mean of its divisors is an integer number (7759692330).

Almost surely, 2^31032101123 is an apocalyptic number.

31032101123 is a deficient number, since it is larger than the sum of its proper divisors (6668197).

31032101123 is an equidigital number, since it uses as much as digits as its factorization.

31032101123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6668196.

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

Adding to 31032101123 its reverse (32110123013), we get a palindrome (63142224136).

The spelling of 31032101123 in words is "thirty-one billion, thirty-two million, one hundred one thousand, one hundred twenty-three".