11112322121 has 4 divisors (see below), whose sum is σ = 11697181200. Its totient is φ = 10527463044.

The previous prime is 11112322099. The next prime is 11112322129. The reversal of 11112322121 is 12122321111.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12122321111 = 71473 ⋅169607.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11112322121 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 11112322121.

It is not an unprimeable number, because it can be changed into a prime (11112322129) 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, 292429511 + ... + 292429548.

It is an arithmetic number, because the mean of its divisors is an integer number (2924295300).

Almost surely, 2^11112322121 is an apocalyptic number.

It is an amenable number.

11112322121 is a deficient number, since it is larger than the sum of its proper divisors (584859079).

11112322121 is an equidigital number, since it uses as much as digits as its factorization.

11112322121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 584859078.

The product of its digits is 48, while the sum is 17.

Adding to 11112322121 its reverse (12122321111), we get a palindrome (23234643232).

It can be divided in two parts, 1111 and 2322121, that added together give a palindrome (2323232).

The spelling of 11112322121 in words is "eleven billion, one hundred twelve million, three hundred twenty-two thousand, one hundred twenty-one".