131211210323021 has 4 divisors (see below), whose sum is σ = 131282250503712. Its totient is φ = 131140170142332.

The previous prime is 131211210322991. The next prime is 131211210323077. The reversal of 131211210323021 is 120323012112131.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 131211210323021 - 2⁶ = 131211210322957 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 (131211210323621) 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 3 ways as a sum of consecutive naturals, for example, 35520087575 + ... + 35520091268.

It is an arithmetic number, because the mean of its divisors is an integer number (32820562625928).

Almost surely, 2^{131211210323021} is an apocalyptic number.

It is an amenable number.

131211210323021 is a deficient number, since it is larger than the sum of its proper divisors (71040180691).

131211210323021 is an equidigital number, since it uses as much as digits as its factorization.

131211210323021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71040180690.

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 131211210323021 its reverse (120323012112131), we get a palindrome (251534222435152).

The spelling of 131211210323021 in words is "one hundred thirty-one trillion, two hundred eleven billion, two hundred ten million, three hundred twenty-three thousand, twenty-one".