2121011335111 has 2 divisors, whose sum is σ = 2121011335112. Its totient is φ = 2121011335110.

The previous prime is 2121011335057. The next prime is 2121011335199. The reversal of 2121011335111 is 1115331101212.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2121011335111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2121011335411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060505667555 + 1060505667556.

It is an arithmetic number, because the mean of its divisors is an integer number (1060505667556).

Almost surely, 2^{2121011335111} is an apocalyptic number.

2121011335111 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121011335111 is an equidigital number, since it uses as much as digits as its factorization.

2121011335111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 180, while the sum is 22.

Adding to 2121011335111 its reverse (1115331101212), we get a palindrome (3236342436323).

The spelling of 2121011335111 in words is "two trillion, one hundred twenty-one billion, eleven million, three hundred thirty-five thousand, one hundred eleven".