131200243421 has 8 divisors (see below), whose sum is σ = 141520837920. Its totient is φ = 120912258672.

The previous prime is 131200243403. The next prime is 131200243429. The reversal of 131200243421 is 124342002131.

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 131200243421 - 2⁶ = 131200243357 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 (131200243429) 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, 8144075 + ... + 8160168.

It is an arithmetic number, because the mean of its divisors is an integer number (17690104740).

Almost surely, 2^131200243421 is an apocalyptic number.

It is an amenable number.

131200243421 is a deficient number, since it is larger than the sum of its proper divisors (10320594499).

131200243421 is a wasteful number, since it uses less digits than its factorization.

131200243421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16304875.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 131200243421 its reverse (124342002131), we get a palindrome (255542245552).

The spelling of 131200243421 in words is "one hundred thirty-one billion, two hundred million, two hundred forty-three thousand, four hundred twenty-one".