123231312122 has 4 divisors (see below), whose sum is σ = 184846968186. Its totient is φ = 61615656060.

The previous prime is 123231312103. The next prime is 123231312179. The reversal of 123231312122 is 221213132321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 221213132321 = 859 ⋅257524019.

It can be written as a sum of positive squares in only one way, i.e., 118486719961 + 4744592161 = 344219^2 + 68881^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30807828029 + ... + 30807828032.

Almost surely, 2^123231312122 is an apocalyptic number.

123231312122 is a deficient number, since it is larger than the sum of its proper divisors (61615656064).

123231312122 is an equidigital number, since it uses as much as digits as its factorization.

123231312122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61615656063.

The product of its digits is 864, while the sum is 23.

Adding to 123231312122 its reverse (221213132321), we get a palindrome (344444444443).

The spelling of 123231312122 in words is "one hundred twenty-three billion, two hundred thirty-one million, three hundred twelve thousand, one hundred twenty-two".