1001223199 has 4 divisors (see below), whose sum is σ = 1001432880. Its totient is φ = 1001013520.

The previous prime is 1001223163. The next prime is 1001223227. The reversal of 1001223199 is 9913221001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9913221001 = 71 ⋅139622831.

It is a cyclic number.

It is not a de Polignac number, because 1001223199 - 2⁹ = 1001222687 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001223149) 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 3 ways as a sum of consecutive naturals, for example, 97507 + ... + 107284.

It is an arithmetic number, because the mean of its divisors is an integer number (250358220).

Almost surely, 2^1001223199 is an apocalyptic number.

1001223199 is a deficient number, since it is larger than the sum of its proper divisors (209681).

1001223199 is an equidigital number, since it uses as much as digits as its factorization.

1001223199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209680.

The product of its (nonzero) digits is 972, while the sum is 28.

The square root of 1001223199 is about 31642.1111653442. Note that the first 4 decimals coincide. The cubic root of 1001223199 is about 1000.4075668667.

The spelling of 1001223199 in words is "one billion, one million, two hundred twenty-three thousand, one hundred ninety-nine".