2121002221111 has 2 divisors, whose sum is σ = 2121002221112. Its totient is φ = 2121002221110.

The previous prime is 2121002221087. The next prime is 2121002221127. The reversal of 2121002221111 is 1111222001212.

It is an a-pointer prime, because the next prime (2121002221127) can be obtained adding 2121002221111 to its sum of digits (16).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2121002221111 - 2¹³ = 2121002212919 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2121002221141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060501110555 + 1060501110556.

It is an arithmetic number, because the mean of its divisors is an integer number (1060501110556).

Almost surely, 2^{2121002221111} is an apocalyptic number.

2121002221111 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121002221111 is an equidigital number, since it uses as much as digits as its factorization.

2121002221111 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 16.

Adding to 2121002221111 its reverse (1111222001212), we get a palindrome (3232224222323).

The spelling of 2121002221111 in words is "two trillion, one hundred twenty-one billion, two million, two hundred twenty-one thousand, one hundred eleven".