131223012 has 24 divisors (see below), whose sum is σ = 307566336. Its totient is φ = 43543968.

The previous prime is 131223011. The next prime is 131223019. The reversal of 131223012 is 210322131.

It is a junction number, because it is equal to n+sod(n) for n = 131222982 and 131223000.

It is not an unprimeable number, because it can be changed into a prime (131223011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21843 + ... + 27194.

It is an arithmetic number, because the mean of its divisors is an integer number (12815264).

Almost surely, 2^131223012 is an apocalyptic number.

131223012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

131223012 is an abundant number, since it is smaller than the sum of its proper divisors (176343324).

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

131223012 is a wasteful number, since it uses less digits than its factorization.

131223012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49267 (or 49265 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 131223012 is about 11455.2613239507. The cubic root of 131223012 is about 508.1633436326.

Adding to 131223012 its reverse (210322131), we get a palindrome (341545143).

The spelling of 131223012 in words is "one hundred thirty-one million, two hundred twenty-three thousand, twelve".