1211122110137 has 2 divisors, whose sum is σ = 1211122110138. Its totient is φ = 1211122110136.

The previous prime is 1211122110089. The next prime is 1211122110181. The reversal of 1211122110137 is 7310112211121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1136486055721 + 74636054416 = 1066061^2 + 273196^2 .

It is a cyclic number.

It is not a de Polignac number, because 1211122110137 - 2⁸ = 1211122109881 is a prime.

It is not a weakly prime, because it can be changed into another prime (1211122110197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605561055068 + 605561055069.

It is an arithmetic number, because the mean of its divisors is an integer number (605561055069).

Almost surely, 2^{1211122110137} is an apocalyptic number.

It is an amenable number.

1211122110137 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211122110137 is an equidigital number, since it uses as much as digits as its factorization.

1211122110137 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 168, while the sum is 23.

Adding to 1211122110137 its reverse (7310112211121), we get a palindrome (8521234321258).

The spelling of 1211122110137 in words is "one trillion, two hundred eleven billion, one hundred twenty-two million, one hundred ten thousand, one hundred thirty-seven".