21214054111 has 2 divisors, whose sum is σ = 21214054112. Its totient is φ = 21214054110.

The previous prime is 21214053923. The next prime is 21214054157. The reversal of 21214054111 is 11145041212.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21214054111 - 2⁹ = 21214053599 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21214054181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10607027055 + 10607027056.

It is an arithmetic number, because the mean of its divisors is an integer number (10607027056).

Almost surely, 2^21214054111 is an apocalyptic number.

21214054111 is a deficient number, since it is larger than the sum of its proper divisors (1).

21214054111 is an equidigital number, since it uses as much as digits as its factorization.

21214054111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 320, while the sum is 22.

Adding to 21214054111 its reverse (11145041212), we get a palindrome (32359095323).

The spelling of 21214054111 in words is "twenty-one billion, two hundred fourteen million, fifty-four thousand, one hundred eleven".