222040204021 has 2 divisors, whose sum is σ = 222040204022. Its totient is φ = 222040204020.

The previous prime is 222040204019. The next prime is 222040204027. The reversal of 222040204021 is 120402040222.

222040204021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 212802303025 + 9237900996 = 461305^2 + 96114^2 .

It is a cyclic number.

It is not a de Polignac number, because 222040204021 - 2¹ = 222040204019 is a prime.

Together with 222040204019, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 222040204021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222040204027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111020102010 + 111020102011.

It is an arithmetic number, because the mean of its divisors is an integer number (111020102011).

Almost surely, 2^222040204021 is an apocalyptic number.

It is an amenable number.

222040204021 is a deficient number, since it is larger than the sum of its proper divisors (1).

222040204021 is an equidigital number, since it uses as much as digits as its factorization.

222040204021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 512, while the sum is 19.

Adding to 222040204021 its reverse (120402040222), we get a palindrome (342442244243).

The spelling of 222040204021 in words is "two hundred twenty-two billion, forty million, two hundred four thousand, twenty-one".