11122112012221 has 4 divisors (see below), whose sum is σ = 12710985156832. Its totient is φ = 9533238867612.

The previous prime is 11122112012197. The next prime is 11122112012243. The reversal of 11122112012221 is 12221021122111.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11122112012221 - 2²⁹ = 11121575141309 is a prime.

It is a super-2 number, since 2×11122112012221² (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 (11122112012021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 794436572295 + ... + 794436572308.

It is an arithmetic number, because the mean of its divisors is an integer number (3177746289208).

Almost surely, 2^{11122112012221} is an apocalyptic number.

It is an amenable number.

11122112012221 is a deficient number, since it is larger than the sum of its proper divisors (1588873144611).

11122112012221 is an equidigital number, since it uses as much as digits as its factorization.

11122112012221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1588873144610.

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

Adding to 11122112012221 its reverse (12221021122111), we get a palindrome (23343133134332).

The spelling of 11122112012221 in words is "eleven trillion, one hundred twenty-two billion, one hundred twelve million, twelve thousand, two hundred twenty-one".