2122221211111 has 2 divisors, whose sum is σ = 2122221211112. Its totient is φ = 2122221211110.

The previous prime is 2122221211087. The next prime is 2122221211141. The reversal of 2122221211111 is 1111121222212.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2122221211111 - 2⁷ = 2122221210983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2122221211141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1061110605555 + 1061110605556.

It is an arithmetic number, because the mean of its divisors is an integer number (1061110605556).

Almost surely, 2^{2122221211111} is an apocalyptic number.

2122221211111 is a deficient number, since it is larger than the sum of its proper divisors (1).

2122221211111 is an equidigital number, since it uses as much as digits as its factorization.

2122221211111 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64, while the sum is 19.

Adding to 2122221211111 its reverse (1111121222212), we get a palindrome (3233342433323).

It can be divided in two parts, 21222212 and 11111, that multiplied together give a palindrome (235799997532).

The spelling of 2122221211111 in words is "two trillion, one hundred twenty-two billion, two hundred twenty-one million, two hundred eleven thousand, one hundred eleven".