1121221019 has 2 divisors, whose sum is σ = 1121221020. Its totient is φ = 1121221018.

The previous prime is 1121220967. The next prime is 1121221033. The reversal of 1121221019 is 9101221211.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1121221019 is a prime.

It is a super-2 number, since 2×1121221019² = 2514273146894796722, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1121241019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560610509 + 560610510.

It is an arithmetic number, because the mean of its divisors is an integer number (560610510).

Almost surely, 2^1121221019 is an apocalyptic number.

1121221019 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121221019 is an equidigital number, since it uses as much as digits as its factorization.

1121221019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 20.

The square root of 1121221019 is about 33484.6385526259. The cubic root of 1121221019 is about 1038.8760722366.

The spelling of 1121221019 in words is "one billion, one hundred twenty-one million, two hundred twenty-one thousand, nineteen".