11135242251 has 24 divisors (see below), whose sum is σ = 18384778464. Its totient is φ = 6362029440.

The previous prime is 11135242249. The next prime is 11135242309. The reversal of 11135242251 is 15224253111.

It is a happy number.

11135242251 is a `hidden beast` number, since 1 + 113 + 524 + 2 + 25 + 1 = 666.

It is not a de Polignac number, because 11135242251 - 2¹ = 11135242249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11135242211) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 722991 + ... + 738231.

It is an arithmetic number, because the mean of its divisors is an integer number (766032436).

Almost surely, 2^11135242251 is an apocalyptic number.

11135242251 is a deficient number, since it is larger than the sum of its proper divisors (7249536213).

11135242251 is a wasteful number, since it uses less digits than its factorization.

11135242251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26851 (or 26848 counting only the distinct ones).

The product of its digits is 2400, while the sum is 27.

Adding to 11135242251 its reverse (15224253111), we get a palindrome (26359495362).

The spelling of 11135242251 in words is "eleven billion, one hundred thirty-five million, two hundred forty-two thousand, two hundred fifty-one".