11137021537 has 2 divisors, whose sum is σ = 11137021538. Its totient is φ = 11137021536.

The previous prime is 11137021507. The next prime is 11137021549. The reversal of 11137021537 is 73512073111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5624850001 + 5512171536 = 74999^2 + 74244^2 .

It is an emirp because it is prime and its reverse (73512073111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11137021537 - 2¹¹ = 11137019489 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11137021499 and 11137021508.

It is not a weakly prime, because it can be changed into another prime (11137021507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5568510768 + 5568510769.

It is an arithmetic number, because the mean of its divisors is an integer number (5568510769).

Almost surely, 2^11137021537 is an apocalyptic number.

It is an amenable number.

11137021537 is a deficient number, since it is larger than the sum of its proper divisors (1).

11137021537 is an equidigital number, since it uses as much as digits as its factorization.

11137021537 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4410, while the sum is 31.

Adding to 11137021537 its reverse (73512073111), we get a palindrome (84649094648).

The spelling of 11137021537 in words is "eleven billion, one hundred thirty-seven million, twenty-one thousand, five hundred thirty-seven".