21416575111 has 2 divisors, whose sum is σ = 21416575112. Its totient is φ = 21416575110.

The previous prime is 21416575099. The next prime is 21416575121. The reversal of 21416575111 is 11157561412.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21416575111 - 2⁵ = 21416575079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21416575121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10708287555 + 10708287556.

It is an arithmetic number, because the mean of its divisors is an integer number (10708287556).

Almost surely, 2^21416575111 is an apocalyptic number.

21416575111 is a deficient number, since it is larger than the sum of its proper divisors (1).

21416575111 is an equidigital number, since it uses as much as digits as its factorization.

21416575111 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8400, while the sum is 34.

The spelling of 21416575111 in words is "twenty-one billion, four hundred sixteen million, five hundred seventy-five thousand, one hundred eleven".