21917114111 has 4 divisors (see below), whose sum is σ = 22624117824. Its totient is φ = 21210110400.

The previous prime is 21917114077. The next prime is 21917114123. The reversal of 21917114111 is 11141171912.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21917114111 - 2¹⁸ = 21916851967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21917114171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 353501810 + ... + 353501871.

It is an arithmetic number, because the mean of its divisors is an integer number (5656029456).

Almost surely, 2^21917114111 is an apocalyptic number.

21917114111 is a deficient number, since it is larger than the sum of its proper divisors (707003713).

21917114111 is an equidigital number, since it uses as much as digits as its factorization.

21917114111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 707003712.

The product of its digits is 504, while the sum is 29.

The spelling of 21917114111 in words is "twenty-one billion, nine hundred seventeen million, one hundred fourteen thousand, one hundred eleven".