3131220340012 has 6 divisors (see below), whose sum is σ = 5479635595028. Its totient is φ = 1565610170004.

The previous prime is 3131220339997. The next prime is 3131220340037. The reversal of 3131220340012 is 2100430221313.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 391402542498 + ... + 391402542505.

Almost surely, 2^{3131220340012} is an apocalyptic number.

It is an amenable number.

3131220340012 is a deficient number, since it is larger than the sum of its proper divisors (2348415255016).

3131220340012 is a wasteful number, since it uses less digits than its factorization.

3131220340012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 782805085007 (or 782805085005 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 3131220340012 its reverse (2100430221313), we get a palindrome (5231650561325).

The spelling of 3131220340012 in words is "three trillion, one hundred thirty-one billion, two hundred twenty million, three hundred forty thousand, twelve".