3131212121231 has 8 divisors (see below), whose sum is σ = 3156845099520. Its totient is φ = 3105594420768.

The previous prime is 3131212121207. The next prime is 3131212121267. The reversal of 3131212121231 is 1321212121313.

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 a de Polignac number, because none of the positive numbers 2^k-3131212121231 is a prime.

It is a super-2 number, since 2×3131212121231² (a number of 26 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 = 3131212121197 and 3131212121206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3131212121131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3407696 + ... + 4227861.

It is an arithmetic number, because the mean of its divisors is an integer number (394605637440).

Almost surely, 2^{3131212121231} is an apocalyptic number.

3131212121231 is a deficient number, since it is larger than the sum of its proper divisors (25632978289).

3131212121231 is a wasteful number, since it uses less digits than its factorization.

3131212121231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7638913.

The product of its digits is 432, while the sum is 23.

Adding to 3131212121231 its reverse (1321212121313), we get a palindrome (4452424242544).

The spelling of 3131212121231 in words is "three trillion, one hundred thirty-one billion, two hundred twelve million, one hundred twenty-one thousand, two hundred thirty-one".