1213133313 has 16 divisors (see below), whose sum is σ = 1867644800. Its totient is φ = 686071296.

The previous prime is 1213133303. The next prime is 1213133333. The reversal of 1213133313 is 3133313121.

It is not a de Polignac number, because 1213133313 - 2⁵ = 1213133281 is a prime.

It is a super-2 number, since 2×1213133313² = 2943384870220711938, which contains 22 as substring.

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1213133313.

It is not an unprimeable number, because it can be changed into a prime (1213133303) 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, 295738 + ... + 299811.

It is an arithmetic number, because the mean of its divisors is an integer number (116727800).

Almost surely, 2^1213133313 is an apocalyptic number.

It is an amenable number.

1213133313 is a deficient number, since it is larger than the sum of its proper divisors (654511487).

1213133313 is an equidigital number, since it uses as much as digits as its factorization.

1213133313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 595656.

The product of its digits is 486, while the sum is 21.

The square root of 1213133313 is about 34830.0633505022. The cubic root of 1213133313 is about 1066.5212415783.

Adding to 1213133313 its reverse (3133313121), we get a palindrome (4346446434).

The spelling of 1213133313 in words is "one billion, two hundred thirteen million, one hundred thirty-three thousand, three hundred thirteen".