11121253513 has 2 divisors, whose sum is σ = 11121253514. Its totient is φ = 11121253512.

The previous prime is 11121253427. The next prime is 11121253537. The reversal of 11121253513 is 31535212111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10934466624 + 186786889 = 104568^2 + 13667^2 .

It is a cyclic number.

It is not a de Polignac number, because 11121253513 - 2²¹ = 11119156361 is a prime.

It is not a weakly prime, because it can be changed into another prime (11121253313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5560626756 + 5560626757.

It is an arithmetic number, because the mean of its divisors is an integer number (5560626757).

Almost surely, 2^11121253513 is an apocalyptic number.

It is an amenable number.

11121253513 is a deficient number, since it is larger than the sum of its proper divisors (1).

11121253513 is an equidigital number, since it uses as much as digits as its factorization.

11121253513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 900, while the sum is 25.

Adding to 11121253513 its reverse (31535212111), we get a palindrome (42656465624).

The spelling of 11121253513 in words is "eleven billion, one hundred twenty-one million, two hundred fifty-three thousand, five hundred thirteen".