1212220303 has 4 divisors (see below), whose sum is σ = 1385394640. Its totient is φ = 1039045968.

The previous prime is 1212220301. The next prime is 1212220333. The reversal of 1212220303 is 3030222121.

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 1212220303 - 2¹ = 1212220301 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212220301) 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 3 ways as a sum of consecutive naturals, for example, 86587158 + ... + 86587171.

It is an arithmetic number, because the mean of its divisors is an integer number (346348660).

Almost surely, 2^1212220303 is an apocalyptic number.

1212220303 is a deficient number, since it is larger than the sum of its proper divisors (173174337).

1212220303 is an equidigital number, since it uses as much as digits as its factorization.

1212220303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173174336.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 1212220303 is about 34816.9542464587. The cubic root of 1212220303 is about 1066.2536180802.

Adding to 1212220303 its reverse (3030222121), we get a palindrome (4242442424).

The spelling of 1212220303 in words is "one billion, two hundred twelve million, two hundred twenty thousand, three hundred three".