1213303122203 has 4 divisors (see below), whose sum is σ = 1266055431888. Its totient is φ = 1160550812520.

The previous prime is 1213303122127. The next prime is 1213303122221. The reversal of 1213303122203 is 3022213033121.

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 1213303122203 - 2¹⁸ = 1213302860059 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 52752309661 = 1213303122203 / (1 + 2 + 1 + 3 + 3 + 0 + 3 + 1 + 2 + 2 + 2 + 0 + 3).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1213303122223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26376154808 + ... + 26376154853.

It is an arithmetic number, because the mean of its divisors is an integer number (316513857972).

Almost surely, 2^{1213303122203} is an apocalyptic number.

1213303122203 is a deficient number, since it is larger than the sum of its proper divisors (52752309685).

1213303122203 is an equidigital number, since it uses as much as digits as its factorization.

1213303122203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52752309684.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 1213303122203 its reverse (3022213033121), we get a palindrome (4235516155324).

The spelling of 1213303122203 in words is "one trillion, two hundred thirteen billion, three hundred three million, one hundred twenty-two thousand, two hundred three".