3121421519 has 2 divisors, whose sum is σ = 3121421520. Its totient is φ = 3121421518.

The previous prime is 3121421503. The next prime is 3121421531. The reversal of 3121421519 is 9151241213.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3121421519 - 2⁴ = 3121421503 is a prime.

It is a super-2 number, since 2×3121421519² = 19486544598552534722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3121421491 and 3121421500.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3121421539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1560710759 + 1560710760.

It is an arithmetic number, because the mean of its divisors is an integer number (1560710760).

Almost surely, 2^3121421519 is an apocalyptic number.

3121421519 is a deficient number, since it is larger than the sum of its proper divisors (1).

3121421519 is an equidigital number, since it uses as much as digits as its factorization.

3121421519 is an odious number, because the sum of its binary digits is odd.

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

The square root of 3121421519 is about 55869.6833622672. The cubic root of 3121421519 is about 1461.4506003894.

The spelling of 3121421519 in words is "three billion, one hundred twenty-one million, four hundred twenty-one thousand, five hundred nineteen".