11221210112111 has 4 divisors (see below), whose sum is σ = 11271529440192. Its totient is φ = 11170890784032.

The previous prime is 11221210112107. The next prime is 11221210112153. The reversal of 11221210112111 is 11121101212211.

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 11221210112111 - 2² = 11221210112107 is a prime.

It is a super-2 number, since 2×11221210112111² (a number of 27 digits) contains 22 as substring.

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 11221210112111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11221210112311) 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, 25159663706 + ... + 25159664151.

It is an arithmetic number, because the mean of its divisors is an integer number (2817882360048).

Almost surely, 2^{11221210112111} is an apocalyptic number.

11221210112111 is a deficient number, since it is larger than the sum of its proper divisors (50319328081).

11221210112111 is an equidigital number, since it uses as much as digits as its factorization.

11221210112111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50319328080.

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

Adding to 11221210112111 its reverse (11121101212211), we get a palindrome (22342311324322).

The spelling of 11221210112111 in words is "eleven trillion, two hundred twenty-one billion, two hundred ten million, one hundred twelve thousand, one hundred eleven".