131223201012 has 24 divisors (see below), whose sum is σ = 340208299200. Its totient is φ = 43741066968.

The previous prime is 131223200993. The next prime is 131223201017. The reversal of 131223201012 is 210102322131.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131223201017) 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, 607514712 + ... + 607514927.

It is an arithmetic number, because the mean of its divisors is an integer number (14175345800).

Almost surely, 2^131223201012 is an apocalyptic number.

131223201012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

131223201012 is an abundant number, since it is smaller than the sum of its proper divisors (208985098188).

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

131223201012 is a wasteful number, since it uses less digits than its factorization.

131223201012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1215029652 (or 1215029644 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 131223201012 its reverse (210102322131), we get a palindrome (341325523143).

The spelling of 131223201012 in words is "one hundred thirty-one billion, two hundred twenty-three million, two hundred one thousand, twelve".