21202202111 has 2 divisors, whose sum is σ = 21202202112. Its totient is φ = 21202202110.

The previous prime is 21202202107. The next prime is 21202202113. The reversal of 21202202111 is 11120220212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21202202111 - 2² = 21202202107 is a prime.

Together with 21202202113, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21202202113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10601101055 + 10601101056.

It is an arithmetic number, because the mean of its divisors is an integer number (10601101056).

Almost surely, 2^21202202111 is an apocalyptic number.

21202202111 is a deficient number, since it is larger than the sum of its proper divisors (1).

21202202111 is an equidigital number, since it uses as much as digits as its factorization.

21202202111 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 14.

Adding to 21202202111 its reverse (11120220212), we get a palindrome (32322422323).

It can be divided in two parts, 2120220211 and 1, that added together give a palindrome (2120220212).

The spelling of 21202202111 in words is "twenty-one billion, two hundred two million, two hundred two thousand, one hundred eleven".