11122120221 has 4 divisors (see below), whose sum is σ = 14829493632. Its totient is φ = 7414746812.

The previous prime is 11122120199. The next prime is 11122120363. The reversal of 11122120221 is 12202122111.

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 a cyclic number.

It is not a de Polignac number, because 11122120221 - 2⁹ = 11122119709 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11122120221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11122120921) 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, 1853686701 + ... + 1853686706.

It is an arithmetic number, because the mean of its divisors is an integer number (3707373408).

Almost surely, 2^11122120221 is an apocalyptic number.

It is an amenable number.

11122120221 is a deficient number, since it is larger than the sum of its proper divisors (3707373411).

11122120221 is an equidigital number, since it uses as much as digits as its factorization.

11122120221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3707373410.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 11122120221 its reverse (12202122111), we get a palindrome (23324242332).

The spelling of 11122120221 in words is "eleven billion, one hundred twenty-two million, one hundred twenty thousand, two hundred twenty-one".