3121002420020 has 48 divisors (see below), whose sum is σ = 6766186215936. Its totient is φ = 1208012400000.

The previous prime is 3121002420001. The next prime is 3121002420061. The reversal of 3121002420020 is 200242001213.

It is a super-2 number, since 2×3121002420020² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6270935 + ... + 6750305.

It is an arithmetic number, because the mean of its divisors is an integer number (140962212832).

Almost surely, 2^{3121002420020} is an apocalyptic number.

It is an amenable number.

3121002420020 is an abundant number, since it is smaller than the sum of its proper divisors (3645183795916).

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

3121002420020 is a wasteful number, since it uses less digits than its factorization.

3121002420020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 489912 (or 489910 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 3121002420020 its reverse (200242001213), we get a palindrome (3321244421233).

The spelling of 3121002420020 in words is "three trillion, one hundred twenty-one billion, two million, four hundred twenty thousand, twenty".