31220102323 has 4 divisors (see below), whose sum is σ = 31230147280. Its totient is φ = 31210057368.

The previous prime is 31220102311. The next prime is 31220102423. The reversal of 31220102323 is 32320102213.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32320102213 = 7 ⋅4617157459.

It is a cyclic number.

It is not a de Polignac number, because 31220102323 - 2²¹ = 31218005171 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 31220102323.

It is not an unprimeable number, because it can be changed into a prime (31220102423) 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, 5017815 + ... + 5024032.

It is an arithmetic number, because the mean of its divisors is an integer number (7807536820).

Almost surely, 2^31220102323 is an apocalyptic number.

31220102323 is a deficient number, since it is larger than the sum of its proper divisors (10044957).

31220102323 is a wasteful number, since it uses less digits than its factorization.

31220102323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10044956.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 31220102323 its reverse (32320102213), we get a palindrome (63540204536).

The spelling of 31220102323 in words is "thirty-one billion, two hundred twenty million, one hundred two thousand, three hundred twenty-three".