222212001212221 has 2 divisors, whose sum is σ = 222212001212222. Its totient is φ = 222212001212220.

The previous prime is 222212001212171. The next prime is 222212001212239. The reversal of 222212001212221 is 122212100212222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 156310255808100 + 65901745404121 = 12502410^2 + 8117989^2 .

It is a cyclic number.

It is not a de Polignac number, because 222212001212221 - 2⁹ = 222212001211709 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 222212001212192 and 222212001212201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222212001212281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111106000606110 + 111106000606111.

It is an arithmetic number, because the mean of its divisors is an integer number (111106000606111).

Almost surely, 2^{222212001212221} is an apocalyptic number.

It is an amenable number.

222212001212221 is a deficient number, since it is larger than the sum of its proper divisors (1).

222212001212221 is an equidigital number, since it uses as much as digits as its factorization.

222212001212221 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 22.

Adding to 222212001212221 its reverse (122212100212222), we get a palindrome (344424101424443).

Subtracting from 222212001212221 its reverse (122212100212222), we obtain a palindrome (99999900999999).

It can be divided in two parts, 222212001 and 212221, that added together give a palindrome (222424222).

The spelling of 222212001212221 in words is "two hundred twenty-two trillion, two hundred twelve billion, one million, two hundred twelve thousand, two hundred twenty-one".