11165022121 has 4 divisors (see below), whose sum is σ = 12180024144. Its totient is φ = 10150020100.

The previous prime is 11165022101. The next prime is 11165022139. The reversal of 11165022121 is 12122056111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 11165022121 - 2¹⁹ = 11164497833 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11165022092 and 11165022101.

It is not an unprimeable number, because it can be changed into a prime (11165022101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 507500995 + ... + 507501016.

It is an arithmetic number, because the mean of its divisors is an integer number (3045006036).

Almost surely, 2^11165022121 is an apocalyptic number.

11165022121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11165022121 is a deficient number, since it is larger than the sum of its proper divisors (1015002023).

11165022121 is a wasteful number, since it uses less digits than its factorization.

11165022121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1015002022.

The product of its (nonzero) digits is 240, while the sum is 22.

Adding to 11165022121 its reverse (12122056111), we get a palindrome (23287078232).

The spelling of 11165022121 in words is "eleven billion, one hundred sixty-five million, twenty-two thousand, one hundred twenty-one".