21110011009 has 8 divisors (see below), whose sum is σ = 22525463840. Its totient is φ = 19724998176.

The previous prime is 21110010983. The next prime is 21110011049. The reversal of 21110011009 is 90011001112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21110011009 - 2⁹ = 21110010497 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21110010983 and 21110011001.

It is not an unprimeable number, because it can be changed into a prime (21110011049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7608567 + ... + 7611340.

It is an arithmetic number, because the mean of its divisors is an integer number (2815682980).

Almost surely, 2^21110011009 is an apocalyptic number.

It is an amenable number.

21110011009 is a deficient number, since it is larger than the sum of its proper divisors (1415452831).

21110011009 is a wasteful number, since it uses less digits than its factorization.

21110011009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15219999.

The product of its (nonzero) digits is 18, while the sum is 16.

The spelling of 21110011009 in words is "twenty-one billion, one hundred ten million, eleven thousand, nine".