221112133231211 has 2 divisors, whose sum is σ = 221112133231212. Its totient is φ = 221112133231210.

The previous prime is 221112133231151. The next prime is 221112133231279. The reversal of 221112133231211 is 112132331211122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221112133231211 - 2⁶ = 221112133231147 is a prime.

It is not a weakly prime, because it can be changed into another prime (221112133231291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110556066615605 + 110556066615606.

It is an arithmetic number, because the mean of its divisors is an integer number (110556066615606).

Almost surely, 2^{221112133231211} is an apocalyptic number.

221112133231211 is a deficient number, since it is larger than the sum of its proper divisors (1).

221112133231211 is an equidigital number, since it uses as much as digits as its factorization.

221112133231211 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 864, while the sum is 26.

Adding to 221112133231211 its reverse (112132331211122), we get a palindrome (333244464442333).

The spelling of 221112133231211 in words is "two hundred twenty-one trillion, one hundred twelve billion, one hundred thirty-three million, two hundred thirty-one thousand, two hundred eleven".