21202210202111 has 2 divisors, whose sum is σ = 21202210202112. Its totient is φ = 21202210202110.

The previous prime is 21202210202077. The next prime is 21202210202161. The reversal of 21202210202111 is 11120201220212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21202210202111 - 2¹⁰ = 21202210201087 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21202210202111.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21202210202161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10601105101055 + 10601105101056.

It is an arithmetic number, because the mean of its divisors is an integer number (10601105101056).

Almost surely, 2^{21202210202111} is an apocalyptic number.

21202210202111 is a deficient number, since it is larger than the sum of its proper divisors (1).

21202210202111 is an equidigital number, since it uses as much as digits as its factorization.

21202210202111 is an evil number, because the sum of its binary digits is even.

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

Adding to 21202210202111 its reverse (11120201220212), we get a palindrome (32322411422323).

The spelling of 21202210202111 in words is "twenty-one trillion, two hundred two billion, two hundred ten million, two hundred two thousand, one hundred eleven".