3121022420 has 12 divisors (see below), whose sum is σ = 6554147124. Its totient is φ = 1248408960.

The previous prime is 3121022417. The next prime is 3121022491. The reversal of 3121022420 is 242201213.

It can be written as a sum of positive squares in 2 ways, for example, as 1275632656 + 1845389764 = 35716^2 + 42958^2 .

It is a super-2 number, since 2×3121022420² = 19481561892285312800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78025541 + ... + 78025580.

It is an arithmetic number, because the mean of its divisors is an integer number (546178927).

Almost surely, 2^3121022420 is an apocalyptic number.

It is an amenable number.

3121022420 is an abundant number, since it is smaller than the sum of its proper divisors (3433124704).

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

3121022420 is a wasteful number, since it uses less digits than its factorization.

3121022420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156051130 (or 156051128 counting only the distinct ones).

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

The square root of 3121022420 is about 55866.1115525325. Note that the first 3 decimals coincide. The cubic root of 3121022420 is about 1461.3883116394.

Adding to 3121022420 its reverse (242201213), we get a palindrome (3363223633).

The spelling of 3121022420 in words is "three billion, one hundred twenty-one million, twenty-two thousand, four hundred twenty".