11121321234637 has 2 divisors, whose sum is σ = 11121321234638. Its totient is φ = 11121321234636.

The previous prime is 11121321234629. The next prime is 11121321234689. The reversal of 11121321234637 is 73643212312111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6182677277001 + 4938643957636 = 2486499^2 + 2222306^2 .

It is a cyclic number.

It is not a de Polignac number, because 11121321234637 - 2³ = 11121321234629 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11121321234596 and 11121321234605.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11121321264637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5560660617318 + 5560660617319.

It is an arithmetic number, because the mean of its divisors is an integer number (5560660617319).

Almost surely, 2^{11121321234637} is an apocalyptic number.

It is an amenable number.

11121321234637 is a deficient number, since it is larger than the sum of its proper divisors (1).

11121321234637 is an equidigital number, since it uses as much as digits as its factorization.

11121321234637 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 37.

Adding to 11121321234637 its reverse (73643212312111), we get a palindrome (84764533546748).

The spelling of 11121321234637 in words is "eleven trillion, one hundred twenty-one billion, three hundred twenty-one million, two hundred thirty-four thousand, six hundred thirty-seven".