21140414111 has 2 divisors, whose sum is σ = 21140414112. Its totient is φ = 21140414110.

The previous prime is 21140414101. The next prime is 21140414153. The reversal of 21140414111 is 11141404112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21140414111 - 2⁶ = 21140414047 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21140414101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10570207055 + 10570207056.

It is an arithmetic number, because the mean of its divisors is an integer number (10570207056).

Almost surely, 2^21140414111 is an apocalyptic number.

21140414111 is a deficient number, since it is larger than the sum of its proper divisors (1).

21140414111 is an equidigital number, since it uses as much as digits as its factorization.

21140414111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 21140414111 its reverse (11141404112), we get a palindrome (32281818223).

Subtracting from 21140414111 its reverse (11141404112), we obtain a palindrome (9999009999).

The spelling of 21140414111 in words is "twenty-one billion, one hundred forty million, four hundred fourteen thousand, one hundred eleven".