123131031213 has 8 divisors (see below), whose sum is σ = 164448792000. Its totient is φ = 81950312288.

The previous prime is 123131031209. The next prime is 123131031259. The reversal of 123131031213 is 312130131321.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 123131031213 - 2² = 123131031209 is a prime.

It is a super-2 number, since 2×123131031213² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 123131031213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123131036213) 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, 34258368 + ... + 34261961.

It is an arithmetic number, because the mean of its divisors is an integer number (20556099000).

Almost surely, 2^123131031213 is an apocalyptic number.

It is an amenable number.

123131031213 is a deficient number, since it is larger than the sum of its proper divisors (41317760787).

123131031213 is an equidigital number, since it uses as much as digits as its factorization.

123131031213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68520931.

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 123131031213 its reverse (312130131321), we get a palindrome (435261162534).

The spelling of 123131031213 in words is "one hundred twenty-three billion, one hundred thirty-one million, thirty-one thousand, two hundred thirteen".