1121132261 has 2 divisors, whose sum is σ = 1121132262. Its totient is φ = 1121132260.

The previous prime is 1121132203. The next prime is 1121132273. The reversal of 1121132261 is 1622311211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 967521025 + 153611236 = 31105^2 + 12394^2 .

It is a cyclic number.

It is not a de Polignac number, because 1121132261 - 2²² = 1116937957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1121137261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560566130 + 560566131.

It is an arithmetic number, because the mean of its divisors is an integer number (560566131).

Almost surely, 2^1121132261 is an apocalyptic number.

It is an amenable number.

1121132261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121132261 is an equidigital number, since it uses as much as digits as its factorization.

1121132261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 144, while the sum is 20.

The square root of 1121132261 is about 33483.3131723848. The cubic root of 1121132261 is about 1038.8486583743.

Adding to 1121132261 its reverse (1622311211), we get a palindrome (2743443472).

The spelling of 1121132261 in words is "one billion, one hundred twenty-one million, one hundred thirty-two thousand, two hundred sixty-one".