31102002123 has 4 divisors (see below), whose sum is σ = 41469336168. Its totient is φ = 20734668080.

The previous prime is 31102002073. The next prime is 31102002131. The reversal of 31102002123 is 32120020113.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32120020113 = 3 ⋅10706673371.

It is a cyclic number.

It is not a de Polignac number, because 31102002123 - 2²⁵ = 31068447691 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31102002023) 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, 5183667018 + ... + 5183667023.

It is an arithmetic number, because the mean of its divisors is an integer number (10367334042).

Almost surely, 2^31102002123 is an apocalyptic number.

31102002123 is a deficient number, since it is larger than the sum of its proper divisors (10367334045).

31102002123 is a wasteful number, since it uses less digits than its factorization.

31102002123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10367334044.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 31102002123 its reverse (32120020113), we get a palindrome (63222022236).

The spelling of 31102002123 in words is "thirty-one billion, one hundred two million, two thousand, one hundred twenty-three".