3120121220 has 24 divisors (see below), whose sum is σ = 6555625944. Its totient is φ = 1247406336.

The previous prime is 3120121211. The next prime is 3120121229. The reversal of 3120121220 is 221210213.

It is a happy number.

3120121220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (3120121211) and next prime (3120121229).

It can be written as a sum of positive squares in 4 ways, for example, as 36096064 + 3084025156 = 6008^2 + 55534^2 .

It is a junction number, because it is equal to n+sod(n) for n = 3120121195 and 3120121204.

It is not an unprimeable number, because it can be changed into a prime (3120121229) 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, 722 + ... + 78998.

It is an arithmetic number, because the mean of its divisors is an integer number (273151081).

Almost surely, 2^3120121220 is an apocalyptic number.

It is an amenable number.

3120121220 is an abundant number, since it is smaller than the sum of its proper divisors (3435504724).

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

3120121220 is a wasteful number, since it uses less digits than its factorization.

3120121220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80279 (or 80277 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 3120121220 is about 55858.0452575992. The cubic root of 3120121220 is about 1461.2476387283.

Adding to 3120121220 its reverse (221210213), we get a palindrome (3341331433).

The spelling of 3120121220 in words is "three billion, one hundred twenty million, one hundred twenty-one thousand, two hundred twenty".