1121712019 has 2 divisors, whose sum is σ = 1121712020. Its totient is φ = 1121712018.

The previous prime is 1121711999. The next prime is 1121712041. The reversal of 1121712019 is 9102171211.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1121712019 is a prime.

It is a super-2 number, since 2×1121712019² = 2516475707138112722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1121711984 and 1121712002.

It is not a weakly prime, because it can be changed into another prime (1121716019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560856009 + 560856010.

It is an arithmetic number, because the mean of its divisors is an integer number (560856010).

Almost surely, 2^1121712019 is an apocalyptic number.

1121712019 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121712019 is an equidigital number, since it uses as much as digits as its factorization.

1121712019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 252, while the sum is 25.

The square root of 1121712019 is about 33491.9694703074. The cubic root of 1121712019 is about 1039.0276967312.

The spelling of 1121712019 in words is "one billion, one hundred twenty-one million, seven hundred twelve thousand, nineteen".