1131222049 has 2 divisors, whose sum is σ = 1131222050. Its totient is φ = 1131222048.

The previous prime is 1131222017. The next prime is 1131222077. The reversal of 1131222049 is 9402221311.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 946669824 + 184552225 = 30768^2 + 13585^2 .

It is a cyclic number.

It is not a de Polignac number, because 1131222049 - 2⁵ = 1131222017 is a prime.

It is not a weakly prime, because it can be changed into another prime (1131222949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 565611024 + 565611025.

It is an arithmetic number, because the mean of its divisors is an integer number (565611025).

Almost surely, 2^1131222049 is an apocalyptic number.

It is an amenable number.

1131222049 is a deficient number, since it is larger than the sum of its proper divisors (1).

1131222049 is an equidigital number, since it uses as much as digits as its factorization.

1131222049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 1131222049 is about 33633.6445988240. The cubic root of 1131222049 is about 1041.9557776481.

The spelling of 1131222049 in words is "one billion, one hundred thirty-one million, two hundred twenty-two thousand, forty-nine".