131201421 has 8 divisors (see below), whose sum is σ = 188391840. Its totient is φ = 80739312.

The previous prime is 131201417. The next prime is 131201443. The reversal of 131201421 is 124102131.

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

It is not a de Polignac number, because 131201421 - 2² = 131201417 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 131201421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131201401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1682031 + ... + 1682108.

It is an arithmetic number, because the mean of its divisors is an integer number (23548980).

Almost surely, 2^131201421 is an apocalyptic number.

It is an amenable number.

131201421 is a deficient number, since it is larger than the sum of its proper divisors (57190419).

131201421 is a wasteful number, since it uses less digits than its factorization.

131201421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3364155.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 131201421 is about 11454.3188797938. The cubic root of 131201421 is about 508.1354715991.

Adding to 131201421 its reverse (124102131), we get a palindrome (255303552).

It can be divided in two parts, 13120 and 1421, that added together give a palindrome (14541).

The spelling of 131201421 in words is "one hundred thirty-one million, two hundred one thousand, four hundred twenty-one".