21212014111 has 2 divisors, whose sum is σ = 21212014112. Its totient is φ = 21212014110.

The previous prime is 21212014097. The next prime is 21212014121. The reversal of 21212014111 is 11141021212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21212014111 - 2⁷ = 21212013983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21212014121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10606007055 + 10606007056.

It is an arithmetic number, because the mean of its divisors is an integer number (10606007056).

Almost surely, 2^21212014111 is an apocalyptic number.

21212014111 is a deficient number, since it is larger than the sum of its proper divisors (1).

21212014111 is an equidigital number, since it uses as much as digits as its factorization.

21212014111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21212014111 its reverse (11141021212), we get a palindrome (32353035323).

The spelling of 21212014111 in words is "twenty-one billion, two hundred twelve million, fourteen thousand, one hundred eleven".