3131112112021 has 8 divisors (see below), whose sum is σ = 3332652747264. Its totient is φ = 2931500095680.

The previous prime is 3131112112019. The next prime is 3131112112087. The reversal of 3131112112021 is 1202112111313.

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 3131112112021 - 2¹ = 3131112112019 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3131112112021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3131112112621) 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, 482151375 + ... + 482157868.

It is an arithmetic number, because the mean of its divisors is an integer number (416581593408).

Almost surely, 2^{3131112112021} is an apocalyptic number.

It is an amenable number.

3131112112021 is a deficient number, since it is larger than the sum of its proper divisors (201540635243).

3131112112021 is a wasteful number, since it uses less digits than its factorization.

3131112112021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 964309451.

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 3131112112021 its reverse (1202112111313), we get a palindrome (4333224223334).

The spelling of 3131112112021 in words is "three trillion, one hundred thirty-one billion, one hundred twelve million, one hundred twelve thousand, twenty-one".