21202022210111 has 2 divisors, whose sum is σ = 21202022210112. Its totient is φ = 21202022210110.

The previous prime is 21202022210101. The next prime is 21202022210197. The reversal of 21202022210111 is 11101222020212.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21202022210111 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21202022210111.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21202022210101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10601011105055 + 10601011105056.

It is an arithmetic number, because the mean of its divisors is an integer number (10601011105056).

Almost surely, 2^{21202022210111} is an apocalyptic number.

21202022210111 is a deficient number, since it is larger than the sum of its proper divisors (1).

21202022210111 is an equidigital number, since it uses as much as digits as its factorization.

21202022210111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21202022210111 its reverse (11101222020212), we get a palindrome (32303244230323).

The spelling of 21202022210111 in words is "twenty-one trillion, two hundred two billion, twenty-two million, two hundred ten thousand, one hundred eleven".