222001211021 has 2 divisors, whose sum is σ = 222001211022. Its totient is φ = 222001211020.

The previous prime is 222001211009. The next prime is 222001211083. The reversal of 222001211021 is 120112100222.

222001211021 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., 205363048900 + 16638162121 = 453170^2 + 128989^2 .

It is a cyclic number.

It is not a de Polignac number, because 222001211021 - 2²⁶ = 221934102157 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 222001210987 and 222001211005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222001211521) 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, 111000605510 + 111000605511.

It is an arithmetic number, because the mean of its divisors is an integer number (111000605511).

Almost surely, 2^222001211021 is an apocalyptic number.

It is an amenable number.

222001211021 is a deficient number, since it is larger than the sum of its proper divisors (1).

222001211021 is an equidigital number, since it uses as much as digits as its factorization.

222001211021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 222001211021 its reverse (120112100222), we get a palindrome (342113311243).

The spelling of 222001211021 in words is "two hundred twenty-two billion, one million, two hundred eleven thousand, twenty-one".