222220111021 has 4 divisors (see below), whose sum is σ = 229882873500. Its totient is φ = 214557348544.

The previous prime is 222220111013. The next prime is 222220111031. The reversal of 222220111021 is 120111022222.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 172885482025 + 49334628996 = 415795^2 + 222114^2 .

It is a cyclic number.

It is not a de Polignac number, because 222220111021 - 2³ = 222220111013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 222220110986 and 222220111004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222220111031) 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, 3831381196 + ... + 3831381253.

It is an arithmetic number, because the mean of its divisors is an integer number (57470718375).

Almost surely, 2^222220111021 is an apocalyptic number.

It is an amenable number.

222220111021 is a deficient number, since it is larger than the sum of its proper divisors (7662762479).

222220111021 is an equidigital number, since it uses as much as digits as its factorization.

222220111021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7662762478.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 222220111021 its reverse (120111022222), we get a palindrome (342331133243).

The spelling of 222220111021 in words is "two hundred twenty-two billion, two hundred twenty million, one hundred eleven thousand, twenty-one".