131212230320 has 80 divisors (see below), whose sum is σ = 307451988480. Its totient is φ = 52075291392.

The previous prime is 131212230287. The next prime is 131212230323. The reversal of 131212230320 is 23032212131.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 131212230292 and 131212230301.

It is not an unprimeable number, because it can be changed into a prime (131212230323) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27430649 + ... + 27435431.

It is an arithmetic number, because the mean of its divisors is an integer number (3843149856).

Almost surely, 2^131212230320 is an apocalyptic number.

131212230320 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 131212230320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (153725994240).

131212230320 is an abundant number, since it is smaller than the sum of its proper divisors (176239758160).

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

131212230320 is a wasteful number, since it uses less digits than its factorization.

131212230320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7402 (or 7396 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 131212230320 its reverse (23032212131), we get a palindrome (154244442451).

The spelling of 131212230320 in words is "one hundred thirty-one billion, two hundred twelve million, two hundred thirty thousand, three hundred twenty".