21900111110009 has 8 divisors (see below), whose sum is σ = 23891917218528. Its totient is φ = 19908452820960.

The previous prime is 21900111109913. The next prime is 21900111110023. The reversal of 21900111110009 is 90001111100912.

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

It is not a de Polignac number, because 21900111110009 - 2⁴⁰ = 20800599482233 is a prime.

It is a super-2 number, since 2×21900111110009² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21900111110009.

It is not an unprimeable number, because it can be changed into a prime (21900111110029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36644972 + ... + 37237805.

It is an arithmetic number, because the mean of its divisors is an integer number (2986489652316).

Almost surely, 2^{21900111110009} is an apocalyptic number.

It is an amenable number.

21900111110009 is a deficient number, since it is larger than the sum of its proper divisors (1991806108519).

21900111110009 is a wasteful number, since it uses less digits than its factorization.

21900111110009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73909735.

The product of its (nonzero) digits is 162, while the sum is 26.

The spelling of 21900111110009 in words is "twenty-one trillion, nine hundred billion, one hundred eleven million, one hundred ten thousand, nine".