1213312019 has 2 divisors, whose sum is σ = 1213312020. Its totient is φ = 1213312018.

The previous prime is 1213311989. The next prime is 1213312033. The reversal of 1213312019 is 9102133121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1213312019 - 2²⁴ = 1196534803 is a prime.

It is a super-2 number, since 2×1213312019² = 2944252110899712722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1213311985 and 1213312003.

It is not a weakly prime, because it can be changed into another prime (1213312039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606656009 + 606656010.

It is an arithmetic number, because the mean of its divisors is an integer number (606656010).

Almost surely, 2^1213312019 is an apocalyptic number.

1213312019 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213312019 is an equidigital number, since it uses as much as digits as its factorization.

1213312019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 1213312019 is about 34832.6286547542. The cubic root of 1213312019 is about 1066.5736085592.

The spelling of 1213312019 in words is "one billion, two hundred thirteen million, three hundred twelve thousand, nineteen".