131223323100 has 144 divisors (see below), whose sum is σ = 390311018496. Its totient is φ = 34014240000.

The previous prime is 131223323089. The next prime is 131223323111. The reversal of 131223323100 is 1323322131.

It is an interprime number because it is at equal distance from previous prime (131223323089) and next prime (131223323111).

It is a super-2 number, since 2×131223323100² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

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 47 ways as a sum of consecutive naturals, for example, 12770965 + ... + 12781235.

It is an arithmetic number, because the mean of its divisors is an integer number (2710493184).

Almost surely, 2^131223323100 is an apocalyptic number.

131223323100 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 131223323100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (195155509248).

131223323100 is an abundant number, since it is smaller than the sum of its proper divisors (259087695396).

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

131223323100 is a wasteful number, since it uses less digits than its factorization.

131223323100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11476 (or 11469 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 131223323100 its reverse (1323322131), we get a palindrome (132546645231).

The spelling of 131223323100 in words is "one hundred thirty-one billion, two hundred twenty-three million, three hundred twenty-three thousand, one hundred".