131223320012 has 24 divisors (see below), whose sum is σ = 234090561600. Its totient is φ = 64345612496.

The previous prime is 131223319993. The next prime is 131223320143. The reversal of 131223320012 is 210023322131.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 564638 + ... + 762405.

It is an arithmetic number, because the mean of its divisors is an integer number (9753773400).

Almost surely, 2^131223320012 is an apocalyptic number.

It is an amenable number.

131223320012 is a deficient number, since it is larger than the sum of its proper divisors (102867241588).

131223320012 is a wasteful number, since it uses less digits than its factorization.

131223320012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1327525 (or 1327523 counting only the distinct ones).

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

Adding to 131223320012 its reverse (210023322131), we get a palindrome (341246642143).

The spelling of 131223320012 in words is "one hundred thirty-one billion, two hundred twenty-three million, three hundred twenty thousand, twelve".