1001221227 has 6 divisors (see below), whose sum is σ = 1446208452. Its totient is φ = 667480812.

The previous prime is 1001221223. The next prime is 1001221231. The reversal of 1001221227 is 7221221001.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1001221223) and next prime (1001221231).

It is not a de Polignac number, because 1001221227 - 2² = 1001221223 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1001221223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 55623393 + ... + 55623410.

It is an arithmetic number, because the mean of its divisors is an integer number (241034742).

Almost surely, 2^1001221227 is an apocalyptic number.

1001221227 is a deficient number, since it is larger than the sum of its proper divisors (444987225).

1001221227 is a wasteful number, since it uses less digits than its factorization.

1001221227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111246809 (or 111246806 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 18.

The square root of 1001221227 is about 31642.0800043234. The cubic root of 1001221227 is about 1000.4069100684.

Adding to 1001221227 its reverse (7221221001), we get a palindrome (8222442228).

The spelling of 1001221227 in words is "one billion, one million, two hundred twenty-one thousand, two hundred twenty-seven".