3121030220 has 96 divisors (see below), whose sum is σ = 8196249600. Its totient is φ = 969834240.

The previous prime is 3121030177. The next prime is 3121030243. The reversal of 3121030220 is 220301213.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 3121030195 and 3121030204.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 534557 + ... + 540363.

It is an arithmetic number, because the mean of its divisors is an integer number (85377600).

Almost surely, 2^3121030220 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3121030220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4098124800).

3121030220 is an abundant number, since it is smaller than the sum of its proper divisors (5075219380).

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

3121030220 is a wasteful number, since it uses less digits than its factorization.

3121030220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6183 (or 6181 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 3121030220 is about 55866.1813622517. The cubic root of 3121030220 is about 1461.3895290631.

Adding to 3121030220 its reverse (220301213), we get a palindrome (3341331433).

The spelling of 3121030220 in words is "three billion, one hundred twenty-one million, thirty thousand, two hundred twenty".