3121220020 has 24 divisors (see below), whose sum is σ = 6559215264. Its totient is φ = 1247601696.

The previous prime is 3121219987. The next prime is 3121220029. The reversal of 3121220020 is 200221213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3121220029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26142 + ... + 83221.

It is an arithmetic number, because the mean of its divisors is an integer number (273300636).

Almost surely, 2^3121220020 is an apocalyptic number.

It is an amenable number.

3121220020 is an abundant number, since it is smaller than the sum of its proper divisors (3437995244).

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

3121220020 is a wasteful number, since it uses less digits than its factorization.

3121220020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110799 (or 110797 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 3121220020 is about 55867.8800385338. The cubic root of 3121220020 is about 1461.4191524129.

Adding to 3121220020 its reverse (200221213), we get a palindrome (3321441233).

The spelling of 3121220020 in words is "three billion, one hundred twenty-one million, two hundred twenty thousand, twenty".