1200221003 has 4 divisors (see below), whose sum is σ = 1229494728. Its totient is φ = 1170947280.

The previous prime is 1200220951. The next prime is 1200221023. The reversal of 1200221003 is 3001220021.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3001220021 = 23 ⋅130487827.

It is a cyclic number.

It is not a de Polignac number, because 1200221003 - 2¹⁴ = 1200204619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1200221023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14636801 + ... + 14636882.

It is an arithmetic number, because the mean of its divisors is an integer number (307373682).

Almost surely, 2^1200221003 is an apocalyptic number.

1200221003 is a deficient number, since it is larger than the sum of its proper divisors (29273725).

1200221003 is an equidigital number, since it uses as much as digits as its factorization.

1200221003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29273724.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 1200221003 is about 34644.2059080591. The cubic root of 1200221003 is about 1062.7238014926.

Adding to 1200221003 its reverse (3001220021), we get a palindrome (4201441024).

The spelling of 1200221003 in words is "one billion, two hundred million, two hundred twenty-one thousand, three".