1131001199 has 2 divisors, whose sum is σ = 1131001200. Its totient is φ = 1131001198.

The previous prime is 1131001187. The next prime is 1131001213. The reversal of 1131001199 is 9911001311.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1131001199 - 2⁸ = 1131000943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1131001169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 565500599 + 565500600.

It is an arithmetic number, because the mean of its divisors is an integer number (565500600).

Almost surely, 2^1131001199 is an apocalyptic number.

1131001199 is a deficient number, since it is larger than the sum of its proper divisors (1).

1131001199 is an equidigital number, since it uses as much as digits as its factorization.

1131001199 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 243, while the sum is 26.

The square root of 1131001199 is about 33630.3612677592. The cubic root of 1131001199 is about 1041.8879657596.

The spelling of 1131001199 in words is "one billion, one hundred thirty-one million, one thousand, one hundred ninety-nine".