20131120312 has 16 divisors (see below), whose sum is σ = 39732474600. Its totient is φ = 9535793760.

The previous prime is 20131120297. The next prime is 20131120337. The reversal of 20131120312 is 21302113102.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66220639 + ... + 66220942.

Almost surely, 2^20131120312 is an apocalyptic number.

It is an amenable number.

20131120312 is a deficient number, since it is larger than the sum of its proper divisors (19601354288).

20131120312 is a wasteful number, since it uses less digits than its factorization.

20131120312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132441606 (or 132441602 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 20131120312 its reverse (21302113102), we get a palindrome (41433233414).

The spelling of 20131120312 in words is "twenty billion, one hundred thirty-one million, one hundred twenty thousand, three hundred twelve".