1211200003 has 8 divisors (see below), whose sum is σ = 1381097088. Its totient is φ = 1052264064.

The previous prime is 1211199971. The next prime is 1211200009. The reversal of 1211200003 is 3000021121.

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 1211200003 - 2⁵ = 1211199971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1211200009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2740051 + ... + 2740492.

It is an arithmetic number, because the mean of its divisors is an integer number (172637136).

Almost surely, 2^1211200003 is an apocalyptic number.

1211200003 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1211200003 is a deficient number, since it is larger than the sum of its proper divisors (169897085).

1211200003 is a wasteful number, since it uses less digits than its factorization.

1211200003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5480573.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 1211200003 is about 34802.2988177505. The cubic root of 1211200003 is about 1065.9543864617.

Adding to 1211200003 its reverse (3000021121), we get a palindrome (4211221124).

The spelling of 1211200003 in words is "one billion, two hundred eleven million, two hundred thousand, three".