9421201187 has 4 divisors (see below), whose sum is σ = 9439215480. Its totient is φ = 9403186896.

The previous prime is 9421201157. The next prime is 9421201199. The reversal of 9421201187 is 7811021249.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7811021249 = 24223 ⋅322463.

It is a cyclic number.

It is not a de Polignac number, because 9421201187 - 2⁶ = 9421201123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9421201157) 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, 9006362 + ... + 9007407.

It is an arithmetic number, because the mean of its divisors is an integer number (2359803870).

Almost surely, 2^9421201187 is an apocalyptic number.

9421201187 is a deficient number, since it is larger than the sum of its proper divisors (18014293).

9421201187 is a wasteful number, since it uses less digits than its factorization.

9421201187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18014292.

The product of its (nonzero) digits is 8064, while the sum is 35.

The square root of 9421201187 is about 97062.8723405608. The cubic root of 9421201187 is about 2112.0397745937.

The spelling of 9421201187 in words is "nine billion, four hundred twenty-one million, two hundred one thousand, one hundred eighty-seven".