1213203103 has 24 divisors (see below), whose sum is σ = 1494709632. Its totient is φ = 979768944.

The previous prime is 1213203091. The next prime is 1213203119. The reversal of 1213203103 is 3013023121.

It is not a de Polignac number, because 1213203103 - 2⁵ = 1213203071 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 (1213203163) 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 23 ways as a sum of consecutive naturals, for example, 67476 + ... + 83542.

It is an arithmetic number, because the mean of its divisors is an integer number (62279568).

Almost surely, 2^1213203103 is an apocalyptic number.

1213203103 is a deficient number, since it is larger than the sum of its proper divisors (281506529).

1213203103 is a wasteful number, since it uses less digits than its factorization.

1213203103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16171 (or 16164 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 1213203103 is about 34831.0652004787. The cubic root of 1213203103 is about 1066.5416930515.

Adding to 1213203103 its reverse (3013023121), we get a palindrome (4226226224).

The spelling of 1213203103 in words is "one billion, two hundred thirteen million, two hundred three thousand, one hundred three".