1213023203 has 4 divisors (see below), whose sum is σ = 1386312240. Its totient is φ = 1039734168.

The previous prime is 1213023187. The next prime is 1213023221. The reversal of 1213023203 is 3023203121.

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 1213023203 - 2⁴ = 1213023187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1213043203) 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, 86644508 + ... + 86644521.

It is an arithmetic number, because the mean of its divisors is an integer number (346578060).

Almost surely, 2^1213023203 is an apocalyptic number.

1213023203 is a deficient number, since it is larger than the sum of its proper divisors (173289037).

1213023203 is an equidigital number, since it uses as much as digits as its factorization.

1213023203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173289036.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 1213023203 is about 34828.4826399314. The cubic root of 1213023203 is about 1066.4889730151.

Adding to 1213023203 its reverse (3023203121), we get a palindrome (4236226324).

The spelling of 1213023203 in words is "one billion, two hundred thirteen million, twenty-three thousand, two hundred three".