131223555120 has 320 divisors, whose sum is σ = 472084070400. Its totient is φ = 29534208000.

The previous prime is 131223555107. The next prime is 131223555139. The reversal of 131223555120 is 21555322131.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 32406856 + ... + 32410904.

It is an arithmetic number, because the mean of its divisors is an integer number (1475262720).

Almost surely, 2^131223555120 is an apocalyptic number.

131223555120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 131223555120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (236042035200).

131223555120 is an abundant number, since it is smaller than the sum of its proper divisors (340860515280).

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

131223555120 is a wasteful number, since it uses less digits than its factorization.

131223555120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4364 (or 4358 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 30.

Adding to 131223555120 its reverse (21555322131), we get a palindrome (152778877251).

The spelling of 131223555120 in words is "one hundred thirty-one billion, two hundred twenty-three million, five hundred fifty-five thousand, one hundred twenty".