11121112112221 has 8 divisors (see below), whose sum is σ = 11399953582080. Its totient is φ = 10844029895088.

The previous prime is 11121112112197. The next prime is 11121112112267. The reversal of 11121112112221 is 12221121112111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11121112112221 - 2⁴¹ = 8922088856669 is a prime.

It is a super-2 number, since 2×11121112112221² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11121112112921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 439800381 + ... + 439825666.

It is an arithmetic number, because the mean of its divisors is an integer number (1424994197760).

Almost surely, 2^{11121112112221} is an apocalyptic number.

It is an amenable number.

11121112112221 is a deficient number, since it is larger than the sum of its proper divisors (278841469859).

11121112112221 is an equidigital number, since it uses as much as digits as its factorization.

11121112112221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 879626363.

The product of its digits is 32, while the sum is 19.

Adding to 11121112112221 its reverse (12221121112111), we get a palindrome (23342233224332).

The spelling of 11121112112221 in words is "eleven trillion, one hundred twenty-one billion, one hundred twelve million, one hundred twelve thousand, two hundred twenty-one".