11110022211221 has 4 divisors (see below), whose sum is σ = 11110044101100. Its totient is φ = 11110000321344.

The previous prime is 11110022211179. The next prime is 11110022211251. The reversal of 11110022211221 is 12211222001111.

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 9032345008996 + 2077677202225 = 3005386^2 + 1441415^2 .

It is a cyclic number.

It is not a de Polignac number, because 11110022211221 - 2⁶ = 11110022211157 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11110022211221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11110022211251) 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, 10165106 + ... + 11204883.

It is an arithmetic number, because the mean of its divisors is an integer number (2777511025275).

Almost surely, 2^{11110022211221} is an apocalyptic number.

It is an amenable number.

11110022211221 is a deficient number, since it is larger than the sum of its proper divisors (21889879).

11110022211221 is an equidigital number, since it uses as much as digits as its factorization.

11110022211221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21889878.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 11110022211221 its reverse (12211222001111), we get a palindrome (23321244212332).

The spelling of 11110022211221 in words is "eleven trillion, one hundred ten billion, twenty-two million, two hundred eleven thousand, two hundred twenty-one".