2013421421 has 4 divisors (see below), whose sum is σ = 2196459744. Its totient is φ = 1830383100.

The previous prime is 2013421409. The next prime is 2013421447. The reversal of 2013421421 is 1241243102.

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 2013421421 - 2¹⁸ = 2013159277 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2013421393 and 2013421402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2013421451) 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, 91519145 + ... + 91519166.

It is an arithmetic number, because the mean of its divisors is an integer number (549114936).

Almost surely, 2^2013421421 is an apocalyptic number.

It is an amenable number.

2013421421 is a deficient number, since it is larger than the sum of its proper divisors (183038323).

2013421421 is a wasteful number, since it uses less digits than its factorization.

2013421421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183038322.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 2013421421 is about 44871.1646940438. The cubic root of 2013421421 is about 1262.7330907861.

Adding to 2013421421 its reverse (1241243102), we get a palindrome (3254664523).

The spelling of 2013421421 in words is "two billion, thirteen million, four hundred twenty-one thousand, four hundred twenty-one".