2121101201111 has 2 divisors, whose sum is σ = 2121101201112. Its totient is φ = 2121101201110.

The previous prime is 2121101201053. The next prime is 2121101201171. The reversal of 2121101201111 is 1111021011212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2121101201111 - 2¹⁰ = 2121101200087 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2121101201171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060550600555 + 1060550600556.

It is an arithmetic number, because the mean of its divisors is an integer number (1060550600556).

Almost surely, 2^{2121101201111} is an apocalyptic number.

2121101201111 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121101201111 is an equidigital number, since it uses as much as digits as its factorization.

2121101201111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 2121101201111 its reverse (1111021011212), we get a palindrome (3232122212323).

The spelling of 2121101201111 in words is "two trillion, one hundred twenty-one billion, one hundred one million, two hundred one thousand, one hundred eleven".