3131203121012 has 24 divisors (see below), whose sum is σ = 5490269008896. Its totient is φ = 1562557795488.

The previous prime is 3131203120963. The next prime is 3131203121041. The reversal of 3131203121012 is 2101213021313.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3869933 + ... + 4608555.

It is an arithmetic number, because the mean of its divisors is an integer number (228761208704).

Almost surely, 2^{3131203121012} is an apocalyptic number.

It is an amenable number.

3131203121012 is a deficient number, since it is larger than the sum of its proper divisors (2359065887884).

3131203121012 is a wasteful number, since it uses less digits than its factorization.

3131203121012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 740687 (or 740685 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 3131203121012 its reverse (2101213021313), we get a palindrome (5232416142325).

The spelling of 3131203121012 in words is "three trillion, one hundred thirty-one billion, two hundred three million, one hundred twenty-one thousand, twelve".