131223313100 has 72 divisors (see below), whose sum is σ = 320662142976. Its totient is φ = 46178280000.

The previous prime is 131223313057. The next prime is 131223313103. The reversal of 131223313100 is 1313322131.

It is a super-2 number, since 2×131223313100² (a number of 23 digits) contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (131223313103) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 1889996 + ... + 1958195.

Almost surely, 2^131223313100 is an apocalyptic number.

131223313100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131223313100 is an abundant number, since it is smaller than the sum of its proper divisors (189438829876).

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

131223313100 is a wasteful number, since it uses less digits than its factorization.

131223313100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3848247 (or 3848240 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 131223313100 its reverse (1313322131), we get a palindrome (132536635231).

The spelling of 131223313100 in words is "one hundred thirty-one billion, two hundred twenty-three million, three hundred thirteen thousand, one hundred".