1131224137 has 2 divisors, whose sum is σ = 1131224138. Its totient is φ = 1131224136.

The previous prime is 1131224089. The next prime is 1131224167. The reversal of 1131224137 is 7314221311.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1017673801 + 113550336 = 31901^2 + 10656^2 .

It is a cyclic number.

It is not a de Polignac number, because 1131224137 - 2²³ = 1122835529 is a prime.

It is not a weakly prime, because it can be changed into another prime (1131224167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 565612068 + 565612069.

It is an arithmetic number, because the mean of its divisors is an integer number (565612069).

Almost surely, 2^1131224137 is an apocalyptic number.

It is an amenable number.

1131224137 is a deficient number, since it is larger than the sum of its proper divisors (1).

1131224137 is an equidigital number, since it uses as much as digits as its factorization.

1131224137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1008, while the sum is 25.

The square root of 1131224137 is about 33633.6756391567. The cubic root of 1131224137 is about 1041.9564187254.

Adding to 1131224137 its reverse (7314221311), we get a palindrome (8445445448).

The spelling of 1131224137 in words is "one billion, one hundred thirty-one million, two hundred twenty-four thousand, one hundred thirty-seven".