11221121102111 has 4 divisors (see below), whose sum is σ = 11881187049312. Its totient is φ = 10561055154912.

The previous prime is 11221121102039. The next prime is 11221121102119. The reversal of 11221121102111 is 11120112112211.

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

It is a cyclic number.

It is not a de Polignac number, because 11221121102111 - 2⁴² = 6823074591007 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 660065947183 = 11221121102111 / (1 + 1 + 2 + 2 + 1 + 1 + 2 + 1 + 1 + 0 + 2 + 1 + 1 + 1).

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 11221121102111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11221121102119) 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, 330032973575 + ... + 330032973608.

It is an arithmetic number, because the mean of its divisors is an integer number (2970296762328).

Almost surely, 2^{11221121102111} is an apocalyptic number.

11221121102111 is a deficient number, since it is larger than the sum of its proper divisors (660065947201).

11221121102111 is an equidigital number, since it uses as much as digits as its factorization.

11221121102111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 660065947200.

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 11221121102111 its reverse (11120112112211), we get a palindrome (22341233214322).

The spelling of 11221121102111 in words is "eleven trillion, two hundred twenty-one billion, one hundred twenty-one million, one hundred two thousand, one hundred eleven".