131201130000021 has 12 divisors (see below), whose sum is σ = 185830435572192. Its totient is φ = 82322277646528.

The previous prime is 131201130000013. The next prime is 131201130000107. The reversal of 131201130000021 is 120000031102131.

It is a happy number.

It is not a de Polignac number, because 131201130000021 - 2³ = 131201130000013 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131201130000011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 75663857265 + ... + 75663858998.

It is an arithmetic number, because the mean of its divisors is an integer number (15485869631016).

Almost surely, 2^{131201130000021} is an apocalyptic number.

It is an amenable number.

131201130000021 is a deficient number, since it is larger than the sum of its proper divisors (54629305572171).

131201130000021 is a wasteful number, since it uses less digits than its factorization.

131201130000021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151327716300 (or 151327716283 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 131201130000021 its reverse (120000031102131), we get a palindrome (251201161102152).

The spelling of 131201130000021 in words is "one hundred thirty-one trillion, two hundred one billion, one hundred thirty million, twenty-one", and thus it is an aban number.