21002022011111 has 2 divisors, whose sum is σ = 21002022011112. Its totient is φ = 21002022011110.

The previous prime is 21002022011099. The next prime is 21002022011123. The reversal of 21002022011111 is 11111022020012.

It is a balanced prime because it is at equal distance from previous prime (21002022011099) and next prime (21002022011123).

It is a cyclic number.

It is not a de Polignac number, because 21002022011111 - 2¹⁴ = 21002021994727 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21002022011171) 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, 10501011005555 + 10501011005556.

It is an arithmetic number, because the mean of its divisors is an integer number (10501011005556).

Almost surely, 2^{21002022011111} is an apocalyptic number.

21002022011111 is a deficient number, since it is larger than the sum of its proper divisors (1).

21002022011111 is an equidigital number, since it uses as much as digits as its factorization.

21002022011111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21002022011111 its reverse (11111022020012), we get a palindrome (32113044031123).

The spelling of 21002022011111 in words is "twenty-one trillion, two billion, twenty-two million, eleven thousand, one hundred eleven".