1131220199 has 2 divisors, whose sum is σ = 1131220200. Its totient is φ = 1131220198.

The previous prime is 1131220193. The next prime is 1131220241. The reversal of 1131220199 is 9910221311.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1131220199 - 2⁴ = 1131220183 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1131220193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 565610099 + 565610100.

It is an arithmetic number, because the mean of its divisors is an integer number (565610100).

Almost surely, 2^1131220199 is an apocalyptic number.

1131220199 is a deficient number, since it is larger than the sum of its proper divisors (1).

1131220199 is an equidigital number, since it uses as much as digits as its factorization.

1131220199 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972, while the sum is 29.

The square root of 1131220199 is about 33633.6170965895. The cubic root of 1131220199 is about 1041.9552096431.

The spelling of 1131220199 in words is "one billion, one hundred thirty-one million, two hundred twenty thousand, one hundred ninety-nine".