131025432421 has 8 divisors (see below), whose sum is σ = 141112291320. Its totient is φ = 120939713472.

The previous prime is 131025432407. The next prime is 131025432427. The reversal of 131025432421 is 124234520131.

It can be written as a sum of positive squares in 4 ways, for example, as 3548584900 + 127476847521 = 59570^2 + 357039^2 .

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 131025432421 - 2⁵ = 131025432389 is a prime.

It is a super-2 number, since 2×131025432421² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 131025432421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131025432427) 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, 38350 + ... + 513343.

It is an arithmetic number, because the mean of its divisors is an integer number (17639036415).

Almost surely, 2^131025432421 is an apocalyptic number.

It is an amenable number.

131025432421 is a deficient number, since it is larger than the sum of its proper divisors (10086858899).

131025432421 is a wasteful number, since it uses less digits than its factorization.

131025432421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 569975.

The product of its (nonzero) digits is 5760, while the sum is 28.

Adding to 131025432421 its reverse (124234520131), we get a palindrome (255259952552).

The spelling of 131025432421 in words is "one hundred thirty-one billion, twenty-five million, four hundred thirty-two thousand, four hundred twenty-one".