3121290050 has 18 divisors (see below), whose sum is σ = 5806334379. Its totient is φ = 1248358000.

The previous prime is 3121290019. The next prime is 3121290077. The reversal of 3121290050 is 500921213.

It can be written as a sum of positive squares in 5 ways, for example, as 1715864929 + 1405425121 = 41423^2 + 37489^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=39505.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3121289998 and 3121290025.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 391100 + ... + 399000.

Almost surely, 2^3121290050 is an apocalyptic number.

3121290050 is a deficient number, since it is larger than the sum of its proper divisors (2685044329).

3121290050 is an frugal number, since it uses more digits than its factorization.

3121290050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15814 (or 7908 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 3121290050 is about 55868.5067815491. The cubic root of 3121290050 is about 1461.4300821580.

The spelling of 3121290050 in words is "three billion, one hundred twenty-one million, two hundred ninety thousand, fifty".