1213330131 has 16 divisors (see below), whose sum is σ = 1935797920. Its totient is φ = 746664480.

The previous prime is 1213330117. The next prime is 1213330133. The reversal of 1213330131 is 1310333121.

It is a happy number.

It is not a de Polignac number, because 1213330131 - 2⁶ = 1213330067 is a prime.

It is a super-2 number, since 2×1213330131² = 2944340013584954322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1213330133) 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, 1728040 + ... + 1728741.

It is an arithmetic number, because the mean of its divisors is an integer number (120987370).

Almost surely, 2^1213330131 is an apocalyptic number.

1213330131 is a deficient number, since it is larger than the sum of its proper divisors (722467789).

1213330131 is a wasteful number, since it uses less digits than its factorization.

1213330131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3456803 (or 3456797 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

The square root of 1213330131 is about 34832.8886399047. Note that the first 3 decimals coincide. The cubic root of 1213330131 is about 1066.5789157087.

Adding to 1213330131 its reverse (1310333121), we get a palindrome (2523663252).

The spelling of 1213330131 in words is "one billion, two hundred thirteen million, three hundred thirty thousand, one hundred thirty-one".