21103032999 has 4 divisors (see below), whose sum is σ = 28137377336. Its totient is φ = 14068688664.

The previous prime is 21103032983. The next prime is 21103033087. The reversal of 21103032999 is 99923030112.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 21103032999 - 2⁴ = 21103032983 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 (21103032799) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3517172164 + ... + 3517172169.

It is an arithmetic number, because the mean of its divisors is an integer number (7034344334).

Almost surely, 2^21103032999 is an apocalyptic number.

21103032999 is a deficient number, since it is larger than the sum of its proper divisors (7034344337).

21103032999 is an equidigital number, since it uses as much as digits as its factorization.

21103032999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7034344336.

The product of its (nonzero) digits is 26244, while the sum is 39.

The spelling of 21103032999 in words is "twenty-one billion, one hundred three million, thirty-two thousand, nine hundred ninety-nine".