131211434033221 has 16 divisors (see below), whose sum is σ = 142200964540800. Its totient is φ = 120586999131648.

The previous prime is 131211434033209. The next prime is 131211434033237. The reversal of 131211434033221 is 122330434112131.

It is a cyclic number.

It is not a de Polignac number, because 131211434033221 - 2¹¹ = 131211434031173 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 (131211434033291) 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, 22851841 + ... + 28011238.

It is an arithmetic number, because the mean of its divisors is an integer number (8887560283800).

Almost surely, 2^{131211434033221} is an apocalyptic number.

It is an amenable number.

131211434033221 is a deficient number, since it is larger than the sum of its proper divisors (10989530507579).

131211434033221 is a wasteful number, since it uses less digits than its factorization.

131211434033221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50866668.

The product of its (nonzero) digits is 10368, while the sum is 31.

Adding to 131211434033221 its reverse (122330434112131), we get a palindrome (253541868145352).

The spelling of 131211434033221 in words is "one hundred thirty-one trillion, two hundred eleven billion, four hundred thirty-four million, thirty-three thousand, two hundred twenty-one".