20120312331 has 24 divisors (see below), whose sum is σ = 34674463440. Its totient is φ = 11497320576.

The previous prime is 20120312291. The next prime is 20120312369. The reversal of 20120312331 is 13321302102.

20120312331 is a `hidden beast` number, since 2 + 0 + 1 + 20 + 312 + 331 = 666.

It is not a de Polignac number, because 20120312331 - 2⁹ = 20120311819 is a prime.

It is a super-2 number, since 2×20120312331² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20120312231) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 7602726 + ... + 7605371.

It is an arithmetic number, because the mean of its divisors is an integer number (1444769310).

Almost surely, 2^20120312331 is an apocalyptic number.

20120312331 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20120312331 is a deficient number, since it is larger than the sum of its proper divisors (14554151109).

20120312331 is a wasteful number, since it uses less digits than its factorization.

20120312331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15208120 (or 15208107 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 20120312331 its reverse (13321302102), we get a palindrome (33441614433).

The spelling of 20120312331 in words is "twenty billion, one hundred twenty million, three hundred twelve thousand, three hundred thirty-one".