11211320137 has 2 divisors, whose sum is σ = 11211320138. Its totient is φ = 11211320136.

The previous prime is 11211320117. The next prime is 11211320143. The reversal of 11211320137 is 73102311211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10611266121 + 600054016 = 103011^2 + 24496^2 .

It is a cyclic number.

It is not a de Polignac number, because 11211320137 - 2⁷ = 11211320009 is a prime.

It is not a weakly prime, because it can be changed into another prime (11211320117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5605660068 + 5605660069.

It is an arithmetic number, because the mean of its divisors is an integer number (5605660069).

Almost surely, 2^11211320137 is an apocalyptic number.

It is an amenable number.

11211320137 is a deficient number, since it is larger than the sum of its proper divisors (1).

11211320137 is an equidigital number, since it uses as much as digits as its factorization.

11211320137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 252, while the sum is 22.

Adding to 11211320137 its reverse (73102311211), we get a palindrome (84313631348).

The spelling of 11211320137 in words is "eleven billion, two hundred eleven million, three hundred twenty thousand, one hundred thirty-seven".