21113340999 has 16 divisors (see below), whose sum is σ = 28564300800. Its totient is φ = 13869681696.

The previous prime is 21113340967. The next prime is 21113341013. The reversal of 21113340999 is 99904331112.

It is not a de Polignac number, because 21113340999 - 2⁵ = 21113340967 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21113340999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21113340499) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30657 + ... + 207765.

It is an arithmetic number, because the mean of its divisors is an integer number (1785268800).

Almost surely, 2^21113340999 is an apocalyptic number.

21113340999 is a deficient number, since it is larger than the sum of its proper divisors (7450959801).

21113340999 is a wasteful number, since it uses less digits than its factorization.

21113340999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177694.

The product of its (nonzero) digits is 52488, while the sum is 42.

The spelling of 21113340999 in words is "twenty-one billion, one hundred thirteen million, three hundred forty thousand, nine hundred ninety-nine".