1212011303 has 4 divisors (see below), whose sum is σ = 1217082720. Its totient is φ = 1206939888.

The previous prime is 1212011299. The next prime is 1212011323. The reversal of 1212011303 is 3031102121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1212011303 - 2² = 1212011299 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 (1212011323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2535350 + ... + 2535827.

It is an arithmetic number, because the mean of its divisors is an integer number (304270680).

Almost surely, 2^1212011303 is an apocalyptic number.

1212011303 is a deficient number, since it is larger than the sum of its proper divisors (5071417).

1212011303 is an equidigital number, since it uses as much as digits as its factorization.

1212011303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5071416.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 1212011303 is about 34813.9527057759. The cubic root of 1212011303 is about 1066.1923366410.

Adding to 1212011303 its reverse (3031102121), we get a palindrome (4243113424).

The spelling of 1212011303 in words is "one billion, two hundred twelve million, eleven thousand, three hundred three".