11221426165 has 16 divisors (see below), whose sum is σ = 13565376000. Its totient is φ = 8910781632.

The previous prime is 11221426123. The next prime is 11221426187. The reversal of 11221426165 is 56162412211.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 11221426165 - 2⁷ = 11221426037 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1306174 + ... + 1314736.

It is an arithmetic number, because the mean of its divisors is an integer number (847836000).

Almost surely, 2^11221426165 is an apocalyptic number.

It is an amenable number.

11221426165 is a deficient number, since it is larger than the sum of its proper divisors (2343949835).

11221426165 is a wasteful number, since it uses less digits than its factorization.

11221426165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10476.

The product of its digits is 5760, while the sum is 31.

Adding to 11221426165 its reverse (56162412211), we get a palindrome (67383838376).

The spelling of 11221426165 in words is "eleven billion, two hundred twenty-one million, four hundred twenty-six thousand, one hundred sixty-five".