131201000421 has 4 divisors (see below), whose sum is σ = 174934667232. Its totient is φ = 87467333612.

The previous prime is 131201000389. The next prime is 131201000449. The reversal of 131201000421 is 124000102131.

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 131201000421 - 2⁵ = 131201000389 is a prime.

It is a super-2 number, since 2×131201000421² (a number of 23 digits) contains 22 as substring.

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 131201000421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131201000461) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21866833401 + ... + 21866833406.

It is an arithmetic number, because the mean of its divisors is an integer number (43733666808).

Almost surely, 2^131201000421 is an apocalyptic number.

It is an amenable number.

131201000421 is a deficient number, since it is larger than the sum of its proper divisors (43733666811).

131201000421 is an equidigital number, since it uses as much as digits as its factorization.

131201000421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43733666810.

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

Adding to 131201000421 its reverse (124000102131), we get a palindrome (255201102552).

The spelling of 131201000421 in words is "one hundred thirty-one billion, two hundred one million, four hundred twenty-one", and thus it is an aban number.