22011111021221 has 8 divisors (see below), whose sum is σ = 25159430956224. Its totient is φ = 18863759962080.

The previous prime is 22011111021203. The next prime is 22011111021239. The reversal of 22011111021221 is 12212011111022.

It is an interprime number because it is at equal distance from previous prime (22011111021203) and next prime (22011111021239).

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 22011111021221 - 2²⁶ = 22011043912357 is a prime.

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 22011111021221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22011111021281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 242170280 + ... + 242261153.

It is an arithmetic number, because the mean of its divisors is an integer number (3144928869528).

Almost surely, 2^{22011111021221} is an apocalyptic number.

It is an amenable number.

22011111021221 is a deficient number, since it is larger than the sum of its proper divisors (3148319935003).

22011111021221 is an equidigital number, since it uses as much as digits as its factorization.

22011111021221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 484437931.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 22011111021221 its reverse (12212011111022), we get a palindrome (34223122132243).

The spelling of 22011111021221 in words is "twenty-two trillion, eleven billion, one hundred eleven million, twenty-one thousand, two hundred twenty-one".