12431021020 has 48 divisors (see below), whose sum is σ = 28500595200. Its totient is φ = 4516838720.

The previous prime is 12431021011. The next prime is 12431021039. The reversal of 12431021020 is 2012013421.

It is a junction number, because it is equal to n+sod(n) for n = 12431020985 and 12431021003.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 268761 + ... + 311599.

It is an arithmetic number, because the mean of its divisors is an integer number (593762400).

Almost surely, 2^12431021020 is an apocalyptic number.

12431021020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12431021020 is an abundant number, since it is smaller than the sum of its proper divisors (16069574180).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12431021020 is a wasteful number, since it uses less digits than its factorization.

12431021020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44178 (or 44176 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 12431021020 its reverse (2012013421), we get a palindrome (14443034441).

The spelling of 12431021020 in words is "twelve billion, four hundred thirty-one million, twenty-one thousand, twenty".