1211133137 has 2 divisors, whose sum is σ = 1211133138. Its totient is φ = 1211133136.

The previous prime is 1211133127. The next prime is 1211133163. The reversal of 1211133137 is 7313311121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1191561361 + 19571776 = 34519^2 + 4424^2 .

It is a cyclic number.

It is not a de Polignac number, because 1211133137 - 2³⁰ = 137391313 is a prime.

It is not a weakly prime, because it can be changed into another prime (1211133127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605566568 + 605566569.

It is an arithmetic number, because the mean of its divisors is an integer number (605566569).

Almost surely, 2^1211133137 is an apocalyptic number.

It is an amenable number.

1211133137 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211133137 is an equidigital number, since it uses as much as digits as its factorization.

1211133137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 378, while the sum is 23.

The square root of 1211133137 is about 34801.3381495597. The cubic root of 1211133137 is about 1065.9347702636.

Adding to 1211133137 its reverse (7313311121), we get a palindrome (8524444258).

The spelling of 1211133137 in words is "one billion, two hundred eleven million, one hundred thirty-three thousand, one hundred thirty-seven".