212222212111321 has 2 divisors, whose sum is σ = 212222212111322. Its totient is φ = 212222212111320.

The previous prime is 212222212111289. The next prime is 212222212111379. The reversal of 212222212111321 is 123111212222212.

212222212111321 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., 210904168051600 + 1318044059721 = 14522540^2 + 1148061^2 .

It is a cyclic number.

It is not a de Polignac number, because 212222212111321 - 2⁵ = 212222212111289 is a prime.

It is not a weakly prime, because it can be changed into another prime (212222212114321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106111106055660 + 106111106055661.

It is an arithmetic number, because the mean of its divisors is an integer number (106111106055661).

Almost surely, 2^{212222212111321} is an apocalyptic number.

It is an amenable number.

212222212111321 is a deficient number, since it is larger than the sum of its proper divisors (1).

212222212111321 is an equidigital number, since it uses as much as digits as its factorization.

212222212111321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 768, while the sum is 25.

Adding to 212222212111321 its reverse (123111212222212), we get a palindrome (335333424333533).

The spelling of 212222212111321 in words is "two hundred twelve trillion, two hundred twenty-two billion, two hundred twelve million, one hundred eleven thousand, three hundred twenty-one".