11122221121201 has 4 divisors (see below), whose sum is σ = 11122437402612. Its totient is φ = 11122004839792.

The previous prime is 11122221121181. The next prime is 11122221121229. The reversal of 11122221121201 is 10212112222111.

It is a happy number.

11122221121201 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6683383130176 + 4438837991025 = 2585224^2 + 2106855^2 .

It is a cyclic number.

It is not a de Polignac number, because 11122221121201 - 2²³ = 11122212732593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11122221121261) 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, 108063550 + ... + 108166423.

It is an arithmetic number, because the mean of its divisors is an integer number (2780609350653).

Almost surely, 2^{11122221121201} is an apocalyptic number.

It is an amenable number.

11122221121201 is a deficient number, since it is larger than the sum of its proper divisors (216281411).

11122221121201 is an equidigital number, since it uses as much as digits as its factorization.

11122221121201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216281410.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 11122221121201 its reverse (10212112222111), we get a palindrome (21334333343312).

The spelling of 11122221121201 in words is "eleven trillion, one hundred twenty-two billion, two hundred twenty-one million, one hundred twenty-one thousand, two hundred one".