131223322100 has 72 divisors (see below), whose sum is σ = 308264936448. Its totient is φ = 48197923200.

The previous prime is 131223322091. The next prime is 131223322157. The reversal of 131223322100 is 1223322131.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15944 + ... + 512543.

Almost surely, 2^131223322100 is an apocalyptic number.

131223322100 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 131223322100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (154132468224).

131223322100 is an abundant number, since it is smaller than the sum of its proper divisors (177041614348).

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

131223322100 is a wasteful number, since it uses less digits than its factorization.

131223322100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 528705 (or 528698 counting only the distinct ones).

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

Adding to 131223322100 its reverse (1223322131), we get a palindrome (132446644231).

The spelling of 131223322100 in words is "one hundred thirty-one billion, two hundred twenty-three million, three hundred twenty-two thousand, one hundred".