1211211003 has 8 divisors (see below), whose sum is σ = 1630041408. Its totient is φ = 799927304.

The previous prime is 1211210977. The next prime is 1211211011. The reversal of 1211211003 is 3001121121.

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 1211211003 - 2²⁰ = 1210162427 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1211211003.

It is not an unprimeable number, because it can be changed into a prime (1211211203) 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, 1886301 + ... + 1886942.

It is an arithmetic number, because the mean of its divisors is an integer number (203755176).

Almost surely, 2^1211211003 is an apocalyptic number.

1211211003 is a deficient number, since it is larger than the sum of its proper divisors (418830405).

1211211003 is a wasteful number, since it uses less digits than its factorization.

1211211003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3773353.

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

The square root of 1211211003 is about 34802.4568529292. The cubic root of 1211211003 is about 1065.9576134165.

Adding to 1211211003 its reverse (3001121121), we get a palindrome (4212332124).

The spelling of 1211211003 in words is "one billion, two hundred eleven million, two hundred eleven thousand, three".