2001340421 has 4 divisors (see below), whose sum is σ = 2050153644. Its totient is φ = 1952527200.

The previous prime is 2001340391. The next prime is 2001340447. The reversal of 2001340421 is 1240431002.

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 662805025 + 1338535396 = 25745^2 + 36586^2 .

It is a cyclic number.

It is not a de Polignac number, because 2001340421 - 2³⁰ = 927598597 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2001340421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001340021) 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, 24406550 + ... + 24406631.

It is an arithmetic number, because the mean of its divisors is an integer number (512538411).

Almost surely, 2^2001340421 is an apocalyptic number.

It is an amenable number.

2001340421 is a deficient number, since it is larger than the sum of its proper divisors (48813223).

2001340421 is an equidigital number, since it uses as much as digits as its factorization.

2001340421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48813222.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 2001340421 is about 44736.3434022049. The cubic root of 2001340421 is about 1260.2024578090.

Adding to 2001340421 its reverse (1240431002), we get a palindrome (3241771423).

The spelling of 2001340421 in words is "two billion, one million, three hundred forty thousand, four hundred twenty-one".