131112420 has 48 divisors (see below), whose sum is σ = 383080320. Its totient is φ = 33442816.

The previous prime is 131112409. The next prime is 131112437. The reversal of 131112420 is 24211131.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 131112420.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46125 + ... + 48884.

It is an arithmetic number, because the mean of its divisors is an integer number (7980840).

Almost surely, 2^131112420 is an apocalyptic number.

131112420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131112420 is an abundant number, since it is smaller than the sum of its proper divisors (251967900).

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

131112420 is a wasteful number, since it uses less digits than its factorization.

131112420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95044 (or 95042 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 131112420 is about 11450.4331795788. The cubic root of 131112420 is about 508.0205470434.

Adding to 131112420 its reverse (24211131), we get a palindrome (155323551).

It can be divided in two parts, 1311 and 12420, that added together give a palindrome (13731).

The spelling of 131112420 in words is "one hundred thirty-one million, one hundred twelve thousand, four hundred twenty".