131222031120 has 120 divisors (see below), whose sum is σ = 441632108736. Its totient is φ = 34917521664.

The previous prime is 131222031041. The next prime is 131222031137. The reversal of 131222031120 is 21130222131.

131222031120 is a `hidden beast` number, since 1 + 312 + 2 + 20 + 311 + 20 = 666.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 131222031093 and 131222031102.

It is an unprimeable number.

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, 141109 + ... + 531371.

Almost surely, 2^131222031120 is an apocalyptic number.

131222031120 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 131222031120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (220816054368).

131222031120 is an abundant number, since it is smaller than the sum of its proper divisors (310410077616).

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

131222031120 is a wasteful number, since it uses less digits than its factorization.

131222031120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390749 (or 390740 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 131222031120 its reverse (21130222131), we get a palindrome (152352253251).

The spelling of 131222031120 in words is "one hundred thirty-one billion, two hundred twenty-two million, thirty-one thousand, one hundred twenty".