222222201020221 has 4 divisors (see below), whose sum is σ = 222290430130332. Its totient is φ = 222153971910112.

The previous prime is 222222201020087. The next prime is 222222201020233. The reversal of 222222201020221 is 122020102222222.

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 147385670062500 + 74836530957721 = 12140250^2 + 8650811^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-222222201020221 is a prime.

It is a super-2 number, since 2×222222201020221² (a number of 29 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 = 222222201020192 and 222222201020201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222222231020221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34114550170 + ... + 34114556683.

It is an arithmetic number, because the mean of its divisors is an integer number (55572607532583).

Almost surely, 2^{222222201020221} is an apocalyptic number.

It is an amenable number.

222222201020221 is a deficient number, since it is larger than the sum of its proper divisors (68229110111).

222222201020221 is an equidigital number, since it uses as much as digits as its factorization.

222222201020221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68229110110.

The product of its (nonzero) digits is 1024, while the sum is 22.

Adding to 222222201020221 its reverse (122020102222222), we get a palindrome (344242303242443).

The spelling of 222222201020221 in words is "two hundred twenty-two trillion, two hundred twenty-two billion, two hundred one million, twenty thousand, two hundred twenty-one".