1121309999 has 2 divisors, whose sum is σ = 1121310000. Its totient is φ = 1121309998.

The previous prime is 1121309993. The next prime is 1121310017. The reversal of 1121309999 is 9999031211.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1121309999 - 2⁸ = 1121309743 is a prime.

It is a super-2 number, since 2×1121309999² = 2514672227714760002, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1121309993) 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, 560654999 + 560655000.

It is an arithmetic number, because the mean of its divisors is an integer number (560655000).

Almost surely, 2^1121309999 is an apocalyptic number.

1121309999 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121309999 is an equidigital number, since it uses as much as digits as its factorization.

1121309999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 39366, while the sum is 44.

The square root of 1121309999 is about 33485.9671952297. The cubic root of 1121309999 is about 1038.9035532138.

The spelling of 1121309999 in words is "one billion, one hundred twenty-one million, three hundred nine thousand, nine hundred ninety-nine".