131444250221 has 4 divisors (see below), whose sum is σ = 131465124000. Its totient is φ = 131423376444.

The previous prime is 131444250181. The next prime is 131444250233. The reversal of 131444250221 is 122052444131.

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 131444250221 - 2³⁴ = 114264381037 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 (131444280221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10427441 + ... + 10440038.

It is an arithmetic number, because the mean of its divisors is an integer number (32866281000).

Almost surely, 2^131444250221 is an apocalyptic number.

It is an amenable number.

131444250221 is a deficient number, since it is larger than the sum of its proper divisors (20873779).

131444250221 is an equidigital number, since it uses as much as digits as its factorization.

131444250221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20873778.

The product of its (nonzero) digits is 7680, while the sum is 29.

Adding to 131444250221 its reverse (122052444131), we get a palindrome (253496694352).

The spelling of 131444250221 in words is "one hundred thirty-one billion, four hundred forty-four million, two hundred fifty thousand, two hundred twenty-one".