1213121233203 has 16 divisors (see below), whose sum is σ = 1764641663616. Its totient is φ = 735182619840.

The previous prime is 1213121233187. The next prime is 1213121233211. The reversal of 1213121233203 is 3023321213121.

It is not a de Polignac number, because 1213121233203 - 2⁴ = 1213121233187 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1213121233903) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 473101 + ... + 1627902.

It is an arithmetic number, because the mean of its divisors is an integer number (110290103976).

Almost surely, 2^{1213121233203} is an apocalyptic number.

1213121233203 is a deficient number, since it is larger than the sum of its proper divisors (551520430413).

1213121233203 is a wasteful number, since it uses less digits than its factorization.

1213121233203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2118514.

The product of its (nonzero) digits is 1296, while the sum is 24.

Adding to 1213121233203 its reverse (3023321213121), we get a palindrome (4236442446324).

The spelling of 1213121233203 in words is "one trillion, two hundred thirteen billion, one hundred twenty-one million, two hundred thirty-three thousand, two hundred three".