11112122201221 has 8 divisors (see below), whose sum is σ = 11265134169600. Its totient is φ = 10959419037840.

The previous prime is 11112122201209. The next prime is 11112122201231. The reversal of 11112122201221 is 12210222121111.

It is a happy number.

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 11112122201221 - 2³¹ = 11109974717573 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 (11112122201231) 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, 77128786 + ... + 77272723.

It is an arithmetic number, because the mean of its divisors is an integer number (1408141771200).

Almost surely, 2^{11112122201221} is an apocalyptic number.

It is an amenable number.

11112122201221 is a deficient number, since it is larger than the sum of its proper divisors (153011968379).

11112122201221 is an equidigital number, since it uses as much as digits as its factorization.

11112122201221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154402499.

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

Adding to 11112122201221 its reverse (12210222121111), we get a palindrome (23322344322332).

The spelling of 11112122201221 in words is "eleven trillion, one hundred twelve billion, one hundred twenty-two million, two hundred one thousand, two hundred twenty-one".