21194201 has 8 divisors (see below), whose sum is σ = 25275264. Its totient is φ = 17376480.

The previous prime is 21194197. The next prime is 21194203. The reversal of 21194201 is 10249112.

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 21194201 - 2² = 21194197 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21194203) 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, 65660 + ... + 65981.

It is an arithmetic number, because the mean of its divisors is an integer number (3159408).

Almost surely, 2^21194201 is an apocalyptic number.

It is an amenable number.

21194201 is a deficient number, since it is larger than the sum of its proper divisors (4081063).

21194201 is a wasteful number, since it uses less digits than its factorization.

21194201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131671.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 21194201 is about 4603.7159990599. The cubic root of 21194201 is about 276.7402631581.

The spelling of 21194201 in words is "twenty-one million, one hundred ninety-four thousand, two hundred one".