220222202012221 has 4 divisors (see below), whose sum is σ = 220222818587772. Its totient is φ = 220221585436672.

The previous prime is 220222202012177. The next prime is 220222202012231. The reversal of 220222202012221 is 122210202222022.

220222202012221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 3904615520100 + 216317586492121 = 1976010^2 + 14707739^2 .

It is a cyclic number.

It is not a de Polignac number, because 220222202012221 - 2⁹ = 220222202011709 is a prime.

It is a super-2 number, since 2×220222202012221² (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 = 220222202012192 and 220222202012201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220222202012231) 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, 307751710 + ... + 308466463.

It is an arithmetic number, because the mean of its divisors is an integer number (55055704646943).

Almost surely, 2^{220222202012221} is an apocalyptic number.

It is an amenable number.

220222202012221 is a deficient number, since it is larger than the sum of its proper divisors (616575551).

220222202012221 is an equidigital number, since it uses as much as digits as its factorization.

220222202012221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 616575550.

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

Adding to 220222202012221 its reverse (122210202222022), we get a palindrome (342432404234243).

The spelling of 220222202012221 in words is "two hundred twenty trillion, two hundred twenty-two billion, two hundred two million, twelve thousand, two hundred twenty-one".