1001221203 has 8 divisors (see below), whose sum is σ = 1338681600. Its totient is φ = 665620808.

The previous prime is 1001221187. The next prime is 1001221223. The reversal of 1001221203 is 3021221001.

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 1001221203 - 2⁴ = 1001221187 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 polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 463743 + ... + 465896.

It is an arithmetic number, because the mean of its divisors is an integer number (167335200).

Almost surely, 2^1001221203 is an apocalyptic number.

1001221203 is a deficient number, since it is larger than the sum of its proper divisors (337460397).

1001221203 is an equidigital number, since it uses as much as digits as its factorization.

1001221203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 930001.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 1001221203 is about 31642.0796250815. The cubic root of 1001221203 is about 1000.4069020749.

Adding to 1001221203 its reverse (3021221001), we get a palindrome (4022442204).

The spelling of 1001221203 in words is "one billion, one million, two hundred twenty-one thousand, two hundred three".