11120111222221 has 4 divisors (see below), whose sum is σ = 11167837021692. Its totient is φ = 11072385422752.

The previous prime is 11120111222183. The next prime is 11120111222251. The reversal of 11120111222221 is 12222211102111.

It is a happy number.

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 2782374122025 + 8337737100196 = 1668045^2 + 2887514^2 .

It is a cyclic number.

It is not a de Polignac number, because 11120111222221 - 2¹³ = 11120111214029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11120111222251) 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, 23862899386 + ... + 23862899851.

It is an arithmetic number, because the mean of its divisors is an integer number (2791959255423).

Almost surely, 2^{11120111222221} is an apocalyptic number.

It is an amenable number.

11120111222221 is a deficient number, since it is larger than the sum of its proper divisors (47725799471).

11120111222221 is an equidigital number, since it uses as much as digits as its factorization.

11120111222221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47725799470.

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

Adding to 11120111222221 its reverse (12222211102111), we get a palindrome (23342322324332).

The spelling of 11120111222221 in words is "eleven trillion, one hundred twenty billion, one hundred eleven million, two hundred twenty-two thousand, two hundred twenty-one".