21112022111 has 2 divisors, whose sum is σ = 21112022112. Its totient is φ = 21112022110.

The previous prime is 21112022081. The next prime is 21112022123. The reversal of 21112022111 is 11122021112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21112022111 - 2¹⁰ = 21112021087 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21112021111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10556011055 + 10556011056.

It is an arithmetic number, because the mean of its divisors is an integer number (10556011056).

Almost surely, 2^21112022111 is an apocalyptic number.

21112022111 is a deficient number, since it is larger than the sum of its proper divisors (1).

21112022111 is an equidigital number, since it uses as much as digits as its factorization.

21112022111 is an evil number, because the sum of its binary digits is even.

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

Adding to 21112022111 its reverse (11122021112), we get a palindrome (32234043223).

Subtracting from 21112022111 its reverse (11122021112), we obtain a palindrome (9990000999).

The spelling of 21112022111 in words is "twenty-one billion, one hundred twelve million, twenty-two thousand, one hundred eleven".