21111002009999 has 8 divisors (see below), whose sum is σ = 24384900717648. Its totient is φ = 18062889420160.

The previous prime is 21111002009983. The next prime is 21111002010017. The reversal of 21111002009999 is 99990020011112.

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 21111002009999 - 2⁴ = 21111002009983 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 (21111002009939) 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, 56446529252 + ... + 56446529625.

It is an arithmetic number, because the mean of its divisors is an integer number (3048112589706).

Almost surely, 2^{21111002009999} is an apocalyptic number.

21111002009999 is a deficient number, since it is larger than the sum of its proper divisors (3273898707649).

21111002009999 is a wasteful number, since it uses less digits than its factorization.

21111002009999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112893058905.

The product of its (nonzero) digits is 26244, while the sum is 44.

The spelling of 21111002009999 in words is "twenty-one trillion, one hundred eleven billion, two million, nine thousand, nine hundred ninety-nine".