21110667011 has 12 divisors (see below), whose sum is σ = 24569293680. Its totient is φ = 18086024880.

The previous prime is 21110666999. The next prime is 21110667013. The reversal of 21110667011 is 11076601112.

It is a happy number.

It is not a de Polignac number, because 21110667011 - 2²⁶ = 21043558147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21110667013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2735 + ... + 205496.

It is an arithmetic number, because the mean of its divisors is an integer number (2047441140).

Almost surely, 2^21110667011 is an apocalyptic number.

21110667011 is a deficient number, since it is larger than the sum of its proper divisors (3458626669).

21110667011 is a wasteful number, since it uses less digits than its factorization.

21110667011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210314 (or 210307 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 26.

The spelling of 21110667011 in words is "twenty-one billion, one hundred ten million, six hundred sixty-seven thousand, eleven".