21201093 has 12 divisors (see below), whose sum is σ = 32235840. Its totient is φ = 13390056.

The previous prime is 21201083. The next prime is 21201109. The reversal of 21201093 is 39010212.

It is a happy number.

It is not a de Polignac number, because 21201093 - 2¹⁸ = 20938949 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21201083) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 61821 + ... + 62162.

It is an arithmetic number, because the mean of its divisors is an integer number (2686320).

Almost surely, 2^21201093 is an apocalyptic number.

It is an amenable number.

21201093 is a deficient number, since it is larger than the sum of its proper divisors (11034747).

21201093 is a wasteful number, since it uses less digits than its factorization.

21201093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124008 (or 124005 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 21201093 is about 4604.4644639741. The cubic root of 21201093 is about 276.7702570102.

The spelling of 21201093 in words is "twenty-one million, two hundred one thousand, ninety-three".