1213312233 has 16 divisors (see below), whose sum is σ = 1852830720. Its totient is φ = 691831056.

The previous prime is 1213312207. The next prime is 1213312249. The reversal of 1213312233 is 3322133121.

It is not a de Polignac number, because 1213312233 - 2²¹ = 1211215081 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (1213312273) 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, 52053 + ... + 71666.

It is an arithmetic number, because the mean of its divisors is an integer number (115801920).

Almost surely, 2^1213312233 is an apocalyptic number.

It is an amenable number.

1213312233 is a deficient number, since it is larger than the sum of its proper divisors (639518487).

1213312233 is a wasteful number, since it uses less digits than its factorization.

1213312233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124196.

The product of its digits is 648, while the sum is 21.

The square root of 1213312233 is about 34832.6317265865. The cubic root of 1213312233 is about 1066.5736712654.

Adding to 1213312233 its reverse (3322133121), we get a palindrome (4535445354).

The spelling of 1213312233 in words is "one billion, two hundred thirteen million, three hundred twelve thousand, two hundred thirty-three".