1213803604435 has 16 divisors (see below), whose sum is σ = 1487598690816. Its totient is φ = 950354519008.

The previous prime is 1213803604337. The next prime is 1213803604469. The reversal of 1213803604435 is 5344063083121.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1213803604435 - 2²³ = 1213795215827 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12123852 + ... + 12223558.

It is an arithmetic number, because the mean of its divisors is an integer number (92974918176).

Almost surely, 2^{1213803604435} is an apocalyptic number.

1213803604435 is a deficient number, since it is larger than the sum of its proper divisors (273795086381).

1213803604435 is an equidigital number, since it uses as much as digits as its factorization.

1213803604435 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151562.

The product of its (nonzero) digits is 207360, while the sum is 40.

Adding to 1213803604435 its reverse (5344063083121), we get a palindrome (6557866687556).

The spelling of 1213803604435 in words is "one trillion, two hundred thirteen billion, eight hundred three million, six hundred four thousand, four hundred thirty-five".