31212222123 has 8 divisors (see below), whose sum is σ = 41695870528. Its totient is φ = 20768360904.

The previous prime is 31212222113. The next prime is 31212222161. The reversal of 31212222123 is 32122221213.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 31212222123 - 2⁵ = 31212222091 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 31212222123.

It is not an unprimeable number, because it can be changed into a prime (31212222113) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9944965 + ... + 9948102.

It is an arithmetic number, because the mean of its divisors is an integer number (5211983816).

Almost surely, 2^31212222123 is an apocalyptic number.

31212222123 is a deficient number, since it is larger than the sum of its proper divisors (10483648405).

31212222123 is a wasteful number, since it uses less digits than its factorization.

31212222123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19893593.

The product of its digits is 576, while the sum is 21.

Adding to 31212222123 its reverse (32122221213), we get a palindrome (63334443336).

The spelling of 31212222123 in words is "thirty-one billion, two hundred twelve million, two hundred twenty-two thousand, one hundred twenty-three".