3121203004020 has 120 divisors (see below), whose sum is σ = 9791863292904. Its totient is φ = 832275419904.

The previous prime is 3121203004009. The next prime is 3121203004033. The reversal of 3121203004020 is 204003021213.

3121203004020 is a `hidden beast` number, since 312 + 12 + 0 + 300 + 40 + 2 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 750576184164 + 2370626819856 = 866358^2 + 1539684^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 3121203003984 and 3121203004002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 38316054 + ... + 38397426.

Almost surely, 2^{3121203004020} is an apocalyptic number.

3121203004020 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3121203004020 is an abundant number, since it is smaller than the sum of its proper divisors (6670660288884).

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

3121203004020 is a wasteful number, since it uses less digits than its factorization.

3121203004020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105071 (or 105060 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 3121203004020 its reverse (204003021213), we get a palindrome (3325206025233).

The spelling of 3121203004020 in words is "three trillion, one hundred twenty-one billion, two hundred three million, four thousand, twenty".