31323200123 has 4 divisors (see below), whose sum is σ = 31854101880. Its totient is φ = 30792298368.

The previous prime is 31323200119. The next prime is 31323200147. The reversal of 31323200123 is 32100232313.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32100232313 = 941 ⋅34112893.

It is a cyclic number.

It is not a de Polignac number, because 31323200123 - 2² = 31323200119 is a prime.

It is a super-2 number, since 2×31323200123² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31323200095 and 31323200104.

It is not an unprimeable number, because it can be changed into a prime (31323200023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 265450790 + ... + 265450907.

It is an arithmetic number, because the mean of its divisors is an integer number (7963525470).

Almost surely, 2^31323200123 is an apocalyptic number.

31323200123 is a deficient number, since it is larger than the sum of its proper divisors (530901757).

31323200123 is an equidigital number, since it uses as much as digits as its factorization.

31323200123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 530901756.

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 31323200123 its reverse (32100232313), we get a palindrome (63423432436).

The spelling of 31323200123 in words is "thirty-one billion, three hundred twenty-three million, two hundred thousand, one hundred twenty-three".