1213122303 has 12 divisors (see below), whose sum is σ = 1754138880. Its totient is φ = 807893856.

The previous prime is 1213122299. The next prime is 1213122343. The reversal of 1213122303 is 3032213121.

1213122303 is a `hidden beast` number, since 121 + 312 + 230 + 3 = 666.

It is not a de Polignac number, because 1213122303 - 2² = 1213122299 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213122343) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 62143 + ... + 79296.

It is an arithmetic number, because the mean of its divisors is an integer number (146178240).

Almost surely, 2^1213122303 is an apocalyptic number.

1213122303 is a deficient number, since it is larger than the sum of its proper divisors (541016577).

1213122303 is a wasteful number, since it uses less digits than its factorization.

1213122303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142398 (or 142395 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 1213122303 is about 34829.9052970289. The cubic root of 1213122303 is about 1066.5180151029.

Adding to 1213122303 its reverse (3032213121), we get a palindrome (4245335424).

The spelling of 1213122303 in words is "one billion, two hundred thirteen million, one hundred twenty-two thousand, three hundred three".