11221134451 has 4 divisors (see below), whose sum is σ = 11222420832. Its totient is φ = 11219848072.

The previous prime is 11221134439. The next prime is 11221134481. The reversal of 11221134451 is 15443112211.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15443112211 = 3529 ⋅4376059.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11221134451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11221134481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 630016 + ... + 647581.

It is an arithmetic number, because the mean of its divisors is an integer number (2805605208).

Almost surely, 2^11221134451 is an apocalyptic number.

11221134451 is a deficient number, since it is larger than the sum of its proper divisors (1286381).

11221134451 is an equidigital number, since it uses as much as digits as its factorization.

11221134451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1286380.

The product of its digits is 960, while the sum is 25.

Adding to 11221134451 its reverse (15443112211), we get a palindrome (26664246662).

The spelling of 11221134451 in words is "eleven billion, two hundred twenty-one million, one hundred thirty-four thousand, four hundred fifty-one".