131221231203133 has 16 divisors (see below), whose sum is σ = 131985796553856. Its totient is φ = 130458872865600.

The previous prime is 131221231203131. The next prime is 131221231203149. The reversal of 131221231203133 is 331302132122131.

It is a cyclic number.

It is not a de Polignac number, because 131221231203133 - 2¹ = 131221231203131 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131221231203131) 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 15 ways as a sum of consecutive naturals, for example, 647927235 + ... + 648129727.

It is an arithmetic number, because the mean of its divisors is an integer number (8249112284616).

Almost surely, 2^{131221231203133} is an apocalyptic number.

It is an amenable number.

131221231203133 is a deficient number, since it is larger than the sum of its proper divisors (764565350723).

131221231203133 is a wasteful number, since it uses less digits than its factorization.

131221231203133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207924.

The product of its (nonzero) digits is 3888, while the sum is 28.

Adding to 131221231203133 its reverse (331302132122131), we get a palindrome (462523363325264).

The spelling of 131221231203133 in words is "one hundred thirty-one trillion, two hundred twenty-one billion, two hundred thirty-one million, two hundred three thousand, one hundred thirty-three".