3121302220 has 24 divisors (see below), whose sum is σ = 6559205184. Its totient is φ = 1247669376.

The previous prime is 3121302169. The next prime is 3121302227. The reversal of 3121302220 is 222031213.

It is a junction number, because it is equal to n+sod(n) for n = 3121302194 and 3121302203.

It is not an unprimeable number, because it can be changed into a prime (3121302227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22737 + ... + 82216.

It is an arithmetic number, because the mean of its divisors is an integer number (273300216).

Almost surely, 2^3121302220 is an apocalyptic number.

It is an amenable number.

3121302220 is an abundant number, since it is smaller than the sum of its proper divisors (3437902964).

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

3121302220 is a wasteful number, since it uses less digits than its factorization.

3121302220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106449 (or 106447 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 3121302220 is about 55868.6156979032. The cubic root of 3121302220 is about 1461.4319815416.

Adding to 3121302220 its reverse (222031213), we get a palindrome (3343333433).

The spelling of 3121302220 in words is "three billion, one hundred twenty-one million, three hundred two thousand, two hundred twenty".