21022204111 has 2 divisors, whose sum is σ = 21022204112. Its totient is φ = 21022204110.

The previous prime is 21022204069. The next prime is 21022204121. The reversal of 21022204111 is 11140222012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21022204111 - 2¹⁵ = 21022171343 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21022204121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10511102055 + 10511102056.

It is an arithmetic number, because the mean of its divisors is an integer number (10511102056).

Almost surely, 2^21022204111 is an apocalyptic number.

21022204111 is a deficient number, since it is larger than the sum of its proper divisors (1).

21022204111 is an equidigital number, since it uses as much as digits as its factorization.

21022204111 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 16.

Adding to 21022204111 its reverse (11140222012), we get a palindrome (32162426123).

The spelling of 21022204111 in words is "twenty-one billion, twenty-two million, two hundred four thousand, one hundred eleven".