131223001012 has 6 divisors (see below), whose sum is σ = 229640251778. Its totient is φ = 65611500504.

The previous prime is 131223000983. The next prime is 131223001067. The reversal of 131223001012 is 210100322131.

It can be written as a sum of positive squares in only one way, i.e., 125942653456 + 5280347556 = 354884^2 + 72666^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16402875123 + ... + 16402875130.

Almost surely, 2^131223001012 is an apocalyptic number.

It is an amenable number.

131223001012 is a deficient number, since it is larger than the sum of its proper divisors (98417250766).

131223001012 is a wasteful number, since it uses less digits than its factorization.

131223001012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32805750257 (or 32805750255 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 131223001012 its reverse (210100322131), we get a palindrome (341323323143).

The spelling of 131223001012 in words is "one hundred thirty-one billion, two hundred twenty-three million, one thousand, twelve".