221112222001211 has 2 divisors, whose sum is σ = 221112222001212. Its totient is φ = 221112222001210.

The previous prime is 221112222001207. The next prime is 221112222001217. The reversal of 221112222001211 is 112100222211122.

221112222001211 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 is a cyclic number.

It is not a de Polignac number, because 221112222001211 - 2² = 221112222001207 is a prime.

It is a super-2 number, since 2×221112222001211² (a number of 29 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (221112222001217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110556111000605 + 110556111000606.

It is an arithmetic number, because the mean of its divisors is an integer number (110556111000606).

Almost surely, 2^{221112222001211} is an apocalyptic number.

221112222001211 is a deficient number, since it is larger than the sum of its proper divisors (1).

221112222001211 is an equidigital number, since it uses as much as digits as its factorization.

221112222001211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 221112222001211 its reverse (112100222211122), we get a palindrome (333212444212333).

The spelling of 221112222001211 in words is "two hundred twenty-one trillion, one hundred twelve billion, two hundred twenty-two million, one thousand, two hundred eleven".