131313121221012 has 48 divisors (see below), whose sum is σ = 320080987000320. Its totient is φ = 41820536042208.

The previous prime is 131313121220999. The next prime is 131313121221013. The reversal of 131313121221012 is 210122121313131.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131313121221013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 269162962 + ... + 269650377.

It is an arithmetic number, because the mean of its divisors is an integer number (6668353895840).

Almost surely, 2^{131313121221012} is an apocalyptic number.

131313121221012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

131313121221012 is an abundant number, since it is smaller than the sum of its proper divisors (188767865779308).

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

131313121221012 is a wasteful number, since it uses less digits than its factorization.

131313121221012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 538814252 (or 538814250 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 24.

Adding to 131313121221012 its reverse (210122121313131), we get a palindrome (341435242534143).

The spelling of 131313121221012 in words is "one hundred thirty-one trillion, three hundred thirteen billion, one hundred twenty-one million, two hundred twenty-one thousand, twelve".