2122012121111 has 2 divisors, whose sum is σ = 2122012121112. Its totient is φ = 2122012121110.

The previous prime is 2122012121081. The next prime is 2122012121197. The reversal of 2122012121111 is 1111212102212.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2122012121111 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2122012121111.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2122012121311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1061006060555 + 1061006060556.

It is an arithmetic number, because the mean of its divisors is an integer number (1061006060556).

Almost surely, 2^{2122012121111} is an apocalyptic number.

2122012121111 is a deficient number, since it is larger than the sum of its proper divisors (1).

2122012121111 is an equidigital number, since it uses as much as digits as its factorization.

2122012121111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 2122012121111 its reverse (1111212102212), we get a palindrome (3233224223323).

The spelling of 2122012121111 in words is "two trillion, one hundred twenty-two billion, twelve million, one hundred twenty-one thousand, one hundred eleven".