201340200421 has 4 divisors (see below), whose sum is σ = 202219415500. Its totient is φ = 200460985344.

The previous prime is 201340200409. The next prime is 201340200493. The reversal of 201340200421 is 124002043102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 146852969796 + 54487230625 = 383214^2 + 233425^2 .

It is a cyclic number.

It is not a de Polignac number, because 201340200421 - 2¹⁵ = 201340167653 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 (201340200821) 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, 439607196 + ... + 439607653.

It is an arithmetic number, because the mean of its divisors is an integer number (50554853875).

Almost surely, 2^201340200421 is an apocalyptic number.

It is an amenable number.

201340200421 is a deficient number, since it is larger than the sum of its proper divisors (879215079).

201340200421 is an equidigital number, since it uses as much as digits as its factorization.

201340200421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 879215078.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 201340200421 its reverse (124002043102), we get a palindrome (325342243523).

The spelling of 201340200421 in words is "two hundred one billion, three hundred forty million, two hundred thousand, four hundred twenty-one".