31320330123 has 4 divisors (see below), whose sum is σ = 41760440168. Its totient is φ = 20880220080.

The previous prime is 31320330121. The next prime is 31320330149. The reversal of 31320330123 is 32103302313.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32103302313 = 3 ⋅10701100771.

It is not a de Polignac number, because 31320330123 - 2¹ = 31320330121 is a prime.

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 31320330123.

It is not an unprimeable number, because it can be changed into a prime (31320330121) 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, 5220055018 + ... + 5220055023.

It is an arithmetic number, because the mean of its divisors is an integer number (10440110042).

Almost surely, 2^31320330123 is an apocalyptic number.

31320330123 is a deficient number, since it is larger than the sum of its proper divisors (10440110045).

31320330123 is a wasteful number, since it uses less digits than its factorization.

31320330123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10440110044.

The product of its (nonzero) digits is 972, while the sum is 21.

Adding to 31320330123 its reverse (32103302313), we get a palindrome (63423632436).

The spelling of 31320330123 in words is "thirty-one billion, three hundred twenty million, three hundred thirty thousand, one hundred twenty-three".