222220300021 has 4 divisors (see below), whose sum is σ = 222221409100. Its totient is φ = 222219190944.

The previous prime is 222220300019. The next prime is 222220300037. The reversal of 222220300021 is 120003022222.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 64472319396 + 157747980625 = 253914^2 + 397175^2 .

It is a cyclic number.

It is not a de Polignac number, because 222220300021 - 2¹ = 222220300019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 222220299968 and 222220300004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222220300121) 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, 160806 + ... + 685783.

It is an arithmetic number, because the mean of its divisors is an integer number (55555352275).

Almost surely, 2^222220300021 is an apocalyptic number.

It is an amenable number.

222220300021 is a deficient number, since it is larger than the sum of its proper divisors (1109079).

222220300021 is an equidigital number, since it uses as much as digits as its factorization.

222220300021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1109078.

The product of its (nonzero) digits is 192, while the sum is 16.

Adding to 222220300021 its reverse (120003022222), we get a palindrome (342223322243).

The spelling of 222220300021 in words is "two hundred twenty-two billion, two hundred twenty million, three hundred thousand, twenty-one".