10221187 has 2 divisors, whose sum is σ = 10221188. Its totient is φ = 10221186.

The previous prime is 10221179. The next prime is 10221191. The reversal of 10221187 is 78112201.

It is a strong prime.

It is an emirp because it is prime and its reverse (78112201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 10221187 - 2³ = 10221179 is a prime.

It is not a weakly prime, because it can be changed into another prime (10221157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5110593 + 5110594.

It is an arithmetic number, because the mean of its divisors is an integer number (5110594).

Almost surely, 2^10221187 is an apocalyptic number.

10221187 is a deficient number, since it is larger than the sum of its proper divisors (1).

10221187 is an equidigital number, since it uses as much as digits as its factorization.

10221187 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 224, while the sum is 22.

The square root of 10221187 is about 3197.0591173765. The cubic root of 10221187 is about 217.0203425471.

Adding to 10221187 its reverse (78112201), we get a palindrome (88333388).

It can be divided in two parts, 1022 and 1187, that added together give a square (2209 = 47²).

The spelling of 10221187 in words is "ten million, two hundred twenty-one thousand, one hundred eighty-seven".