21100083 has 8 divisors (see below), whose sum is σ = 28594896. Its totient is φ = 13836000.

The previous prime is 21100069. The next prime is 21100087. The reversal of 21100083 is 38000112.

It is a happy number.

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

It is not a de Polignac number, because 21100083 - 2⁶ = 21100019 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21100087) 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, 57468 + ... + 57833.

It is an arithmetic number, because the mean of its divisors is an integer number (3574362).

Almost surely, 2^21100083 is an apocalyptic number.

21100083 is a deficient number, since it is larger than the sum of its proper divisors (7494813).

21100083 is a wasteful number, since it uses less digits than its factorization.

21100083 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115365.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 21100083 is about 4593.4826656906. The cubic root of 21100083 is about 276.3300111530.

Adding to 21100083 its reverse (38000112), we get a palindrome (59100195).

The spelling of 21100083 in words is "twenty-one million, one hundred thousand, eighty-three".