1216530103233 has 4 divisors (see below), whose sum is σ = 1622040137648. Its totient is φ = 811020068820.

The previous prime is 1216530103213. The next prime is 1216530103237. The reversal of 1216530103233 is 3323010356121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1216530103233 - 2²⁵ = 1216496548801 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1216530103233.

It is not an unprimeable number, because it can be changed into a prime (1216530103237) 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, 202755017203 + ... + 202755017208.

It is an arithmetic number, because the mean of its divisors is an integer number (405510034412).

Almost surely, 2^{1216530103233} is an apocalyptic number.

It is an amenable number.

1216530103233 is a deficient number, since it is larger than the sum of its proper divisors (405510034415).

1216530103233 is an equidigital number, since it uses as much as digits as its factorization.

1216530103233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405510034414.

The product of its (nonzero) digits is 9720, while the sum is 30.

Adding to 1216530103233 its reverse (3323010356121), we get a palindrome (4539540459354).

The spelling of 1216530103233 in words is "one trillion, two hundred sixteen billion, five hundred thirty million, one hundred three thousand, two hundred thirty-three".