611121111137 has 2 divisors, whose sum is σ = 611121111138. Its totient is φ = 611121111136.

The previous prime is 611121111077. The next prime is 611121111143. The reversal of 611121111137 is 731111121116.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 553225051681 + 57896059456 = 743791^2 + 240616^2 .

It is a cyclic number.

It is not a de Polignac number, because 611121111137 - 2⁸ = 611121110881 is a prime.

It is not a weakly prime, because it can be changed into another prime (611121101137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305560555568 + 305560555569.

It is an arithmetic number, because the mean of its divisors is an integer number (305560555569).

Almost surely, 2^611121111137 is an apocalyptic number.

It is an amenable number.

611121111137 is a deficient number, since it is larger than the sum of its proper divisors (1).

611121111137 is an equidigital number, since it uses as much as digits as its factorization.

611121111137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 252, while the sum is 26.

The spelling of 611121111137 in words is "six hundred eleven billion, one hundred twenty-one million, one hundred eleven thousand, one hundred thirty-seven".