131401322421221 has 4 divisors (see below), whose sum is σ = 131401349028000. Its totient is φ = 131401295814444.

The previous prime is 131401322421217. The next prime is 131401322421277. The reversal of 131401322421221 is 122124223104131.

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 131401322421221 - 2² = 131401322421217 is a prime.

It is a super-2 number, since 2×131401322421221² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131401322421121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3475121 + ... + 16579478.

It is an arithmetic number, because the mean of its divisors is an integer number (32850337257000).

Almost surely, 2^{131401322421221} is an apocalyptic number.

It is an amenable number.

131401322421221 is a deficient number, since it is larger than the sum of its proper divisors (26606779).

131401322421221 is an equidigital number, since it uses as much as digits as its factorization.

131401322421221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26606778.

The product of its (nonzero) digits is 4608, while the sum is 29.

Adding to 131401322421221 its reverse (122124223104131), we get a palindrome (253525545525352).

The spelling of 131401322421221 in words is "one hundred thirty-one trillion, four hundred one billion, three hundred twenty-two million, four hundred twenty-one thousand, two hundred twenty-one".