3121202031020 has 48 divisors (see below), whose sum is σ = 6639719294208. Its totient is φ = 1232332159680.

The previous prime is 3121202030993. The next prime is 3121202031023. The reversal of 3121202031020 is 201302021213.

It is a self number, because there is not a number n which added to its sum of digits gives 3121202031020.

It is not an unprimeable number, because it can be changed into a prime (3121202031023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1835246 + ... + 3100085.

It is an arithmetic number, because the mean of its divisors is an integer number (138327485296).

Almost surely, 2^{3121202031020} is an apocalyptic number.

It is an amenable number.

3121202031020 is an abundant number, since it is smaller than the sum of its proper divisors (3518517263188).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3121202031020 is a wasteful number, since it uses less digits than its factorization.

3121202031020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4935750 (or 4935748 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 3121202031020 its reverse (201302021213), we get a palindrome (3322504052233).

The spelling of 3121202031020 in words is "three trillion, one hundred twenty-one billion, two hundred two million, thirty-one thousand, twenty".