1131122329 has 4 divisors (see below), whose sum is σ = 1149665380. Its totient is φ = 1112579280.

The previous prime is 1131122323. The next prime is 1131122339. The reversal of 1131122329 is 9232211311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9232211311 = 22937 ⋅402503.

It can be written as a sum of positive squares in 2 ways, for example, as 283147929 + 847974400 = 16827^2 + 29120^2 .

It is a cyclic number.

It is not a de Polignac number, because 1131122329 - 2¹⁹ = 1130598041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1131122323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9271434 + ... + 9271555.

It is an arithmetic number, because the mean of its divisors is an integer number (287416345).

Almost surely, 2^1131122329 is an apocalyptic number.

It is an amenable number.

1131122329 is a deficient number, since it is larger than the sum of its proper divisors (18543051).

1131122329 is an equidigital number, since it uses as much as digits as its factorization.

1131122329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18543050.

The product of its digits is 648, while the sum is 25.

The square root of 1131122329 is about 33632.1621219927. The cubic root of 1131122329 is about 1041.9251597620.

The spelling of 1131122329 in words is "one billion, one hundred thirty-one million, one hundred twenty-two thousand, three hundred twenty-nine".