131220023012 has 12 divisors (see below), whose sum is σ = 247299274236. Its totient is φ = 60563087520.

The previous prime is 131220023003. The next prime is 131220023027. The reversal of 131220023012 is 210320022131.

It can be written as a sum of positive squares in 2 ways, for example, as 90639532096 + 40580490916 = 301064^2 + 201446^2 .

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1261730939 + ... + 1261731042.

It is an arithmetic number, because the mean of its divisors is an integer number (20608272853).

Almost surely, 2^131220023012 is an apocalyptic number.

It is an amenable number.

131220023012 is a deficient number, since it is larger than the sum of its proper divisors (116079251224).

131220023012 is a wasteful number, since it uses less digits than its factorization.

131220023012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2523461998 (or 2523461996 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 131220023012 its reverse (210320022131), we get a palindrome (341540045143).

The spelling of 131220023012 in words is "one hundred thirty-one billion, two hundred twenty million, twenty-three thousand, twelve".