123212031331 has 4 divisors (see below), whose sum is σ = 123234858000. Its totient is φ = 123189204664.

The previous prime is 123212031323. The next prime is 123212031347. The reversal of 123212031331 is 133130212321.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 123212031331 - 2³ = 123212031323 is a prime.

It is a super-2 number, since 2×123212031331² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123212031301) 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, 11405236 + ... + 11416033.

It is an arithmetic number, because the mean of its divisors is an integer number (30808714500).

Almost surely, 2^123212031331 is an apocalyptic number.

123212031331 is a deficient number, since it is larger than the sum of its proper divisors (22826669).

123212031331 is an equidigital number, since it uses as much as digits as its factorization.

123212031331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22826668.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 123212031331 its reverse (133130212321), we get a palindrome (256342243652).

The spelling of 123212031331 in words is "one hundred twenty-three billion, two hundred twelve million, thirty-one thousand, three hundred thirty-one".