1121200999991 has 2 divisors, whose sum is σ = 1121200999992. Its totient is φ = 1121200999990.

The previous prime is 1121200999969. The next prime is 1121201000009. The reversal of 1121200999991 is 1999990021211.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1121200999991 - 2⁶ = 1121200999927 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1121200999901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560600499995 + 560600499996.

It is an arithmetic number, because the mean of its divisors is an integer number (560600499996).

Almost surely, 2^{1121200999991} is an apocalyptic number.

1121200999991 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121200999991 is an equidigital number, since it uses as much as digits as its factorization.

1121200999991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 236196, while the sum is 53.

The spelling of 1121200999991 in words is "one trillion, one hundred twenty-one billion, two hundred million, nine hundred ninety-nine thousand, nine hundred ninety-one".