1131201329 has 2 divisors, whose sum is σ = 1131201330. Its totient is φ = 1131201328.

The previous prime is 1131201299. The next prime is 1131201343. The reversal of 1131201329 is 9231021311.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 631768225 + 499433104 = 25135^2 + 22348^2 .

It is a cyclic number.

It is not a de Polignac number, because 1131201329 - 2⁸ = 1131201073 is a prime.

It is not a weakly prime, because it can be changed into another prime (1131201349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 565600664 + 565600665.

It is an arithmetic number, because the mean of its divisors is an integer number (565600665).

Almost surely, 2^1131201329 is an apocalyptic number.

It is an amenable number.

1131201329 is a deficient number, since it is larger than the sum of its proper divisors (1).

1131201329 is an equidigital number, since it uses as much as digits as its factorization.

1131201329 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 1131201329 is about 33633.3365725139. The cubic root of 1131201329 is about 1041.9494159570.

The spelling of 1131201329 in words is "one billion, one hundred thirty-one million, two hundred one thousand, three hundred twenty-nine".