11165220051 has 8 divisors (see below), whose sum is σ = 14920566720. Its totient is φ = 7426676712.

The previous prime is 11165220043. The next prime is 11165220089. The reversal of 11165220051 is 15002256111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11165220051 - 2³ = 11165220043 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11165220551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4199281 + ... + 4201938.

It is an arithmetic number, because the mean of its divisors is an integer number (1865070840).

Almost surely, 2^11165220051 is an apocalyptic number.

11165220051 is a deficient number, since it is larger than the sum of its proper divisors (3755346669).

11165220051 is an equidigital number, since it uses as much as digits as its factorization.

11165220051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8401665.

The product of its (nonzero) digits is 600, while the sum is 24.

Adding to 11165220051 its reverse (15002256111), we get a palindrome (26167476162).

The spelling of 11165220051 in words is "eleven billion, one hundred sixty-five million, two hundred twenty thousand, fifty-one".