222111020221 has 4 divisors (see below), whose sum is σ = 222586633152. Its totient is φ = 221635407292.

The previous prime is 222111020207. The next prime is 222111020233. The reversal of 222111020221 is 122020111222.

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 222111020221 - 2¹⁷ = 222110889149 is a prime.

It is a super-2 number, since 2×222111020221² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 222111020195 and 222111020204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222111020321) 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, 237805765 + ... + 237806698.

It is an arithmetic number, because the mean of its divisors is an integer number (55646658288).

Almost surely, 2^222111020221 is an apocalyptic number.

It is an amenable number.

222111020221 is a deficient number, since it is larger than the sum of its proper divisors (475612931).

222111020221 is an equidigital number, since it uses as much as digits as its factorization.

222111020221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 475612930.

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

Adding to 222111020221 its reverse (122020111222), we get a palindrome (344131131443).

The spelling of 222111020221 in words is "two hundred twenty-two billion, one hundred eleven million, twenty thousand, two hundred twenty-one".