131421404521 has 8 divisors (see below), whose sum is σ = 143779608000. Its totient is φ = 119131668240.

The previous prime is 131421404489. The next prime is 131421404539. The reversal of 131421404521 is 125404124131.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 131421404521 - 2⁵ = 131421404489 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 131421404521.

It is not an unprimeable number, because it can be changed into a prime (131421404321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17112781 + ... + 17120458.

It is an arithmetic number, because the mean of its divisors is an integer number (17972451000).

Almost surely, 2^131421404521 is an apocalyptic number.

131421404521 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

131421404521 is a deficient number, since it is larger than the sum of its proper divisors (12358203479).

131421404521 is a wasteful number, since it uses less digits than its factorization.

131421404521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34233599.

The product of its (nonzero) digits is 3840, while the sum is 28.

Adding to 131421404521 its reverse (125404124131), we get a palindrome (256825528652).

The spelling of 131421404521 in words is "one hundred thirty-one billion, four hundred twenty-one million, four hundred four thousand, five hundred twenty-one".