131002232220 has 288 divisors, whose sum is σ = 432482162112. Its totient is φ = 31969050624.

The previous prime is 131002232209. The next prime is 131002232281. The reversal of 131002232220 is 22232200131.

It is a super-2 number, since 2×131002232220² (a number of 23 digits) contains 22 as substring.

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 = 131002232193 and 131002232202.

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 95 ways as a sum of consecutive naturals, for example, 30656004 + ... + 30660276.

It is an arithmetic number, because the mean of its divisors is an integer number (1501674174).

Almost surely, 2^131002232220 is an apocalyptic number.

131002232220 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 131002232220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (216241081056).

131002232220 is an abundant number, since it is smaller than the sum of its proper divisors (301479929892).

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

131002232220 is a wasteful number, since it uses less digits than its factorization.

131002232220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4581 (or 4576 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 131002232220 its reverse (22232200131), we get a palindrome (153234432351).

The spelling of 131002232220 in words is "one hundred thirty-one billion, two million, two hundred thirty-two thousand, two hundred twenty".