1213333131 has 8 divisors (see below), whose sum is σ = 1657235664. Its totient is φ = 789159680.

The previous prime is 1213333111. The next prime is 1213333139. The reversal of 1213333131 is 1313333121.

1213333131 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1213333131 - 2¹⁴ = 1213316747 is a prime.

It is a super-2 number, since 2×1213333131² = 2944354573564526322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1213333098 and 1213333107.

It is not an unprimeable number, because it can be changed into a prime (1213333139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4932126 + ... + 4932371.

It is an arithmetic number, because the mean of its divisors is an integer number (207154458).

Almost surely, 2^1213333131 is an apocalyptic number.

1213333131 is a deficient number, since it is larger than the sum of its proper divisors (443902533).

1213333131 is an equidigital number, since it uses as much as digits as its factorization.

1213333131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9864541.

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

The square root of 1213333131 is about 34832.9317026288. The cubic root of 1213333131 is about 1066.5797947589.

Adding to 1213333131 its reverse (1313333121), we get a palindrome (2526666252).

The spelling of 1213333131 in words is "one billion, two hundred thirteen million, three hundred thirty-three thousand, one hundred thirty-one".