3121125419 has 4 divisors (see below), whose sum is σ = 3123699696. Its totient is φ = 3118551144.

The previous prime is 3121125391. The next prime is 3121125433. The reversal of 3121125419 is 9145211213.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3121125419 is a prime.

It is a super-2 number, since 2×3121125419² = 19482847762255851122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3121125391 and 3121125400.

It is not an unprimeable number, because it can be changed into a prime (3121125019) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1285319 + ... + 1287744.

It is an arithmetic number, because the mean of its divisors is an integer number (780924924).

Almost surely, 2^3121125419 is an apocalyptic number.

3121125419 is a deficient number, since it is larger than the sum of its proper divisors (2574277).

3121125419 is a wasteful number, since it uses less digits than its factorization.

3121125419 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2574276.

The product of its digits is 2160, while the sum is 29.

The square root of 3121125419 is about 55867.0333828457. The cubic root of 3121125419 is about 1461.4043875550.

The spelling of 3121125419 in words is "three billion, one hundred twenty-one million, one hundred twenty-five thousand, four hundred nineteen".