2012440421 has 4 divisors (see below), whose sum is σ = 2040008172. Its totient is φ = 1984872672.

The previous prime is 2012440411. The next prime is 2012440427. The reversal of 2012440421 is 1240442102.

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 1231237921 + 781202500 = 35089^2 + 27950^2 .

It is a cyclic number.

It is not a de Polignac number, because 2012440421 - 2⁶ = 2012440357 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2012440393 and 2012440402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2012440427) 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, 13783766 + ... + 13783911.

It is an arithmetic number, because the mean of its divisors is an integer number (510002043).

Almost surely, 2^2012440421 is an apocalyptic number.

It is an amenable number.

2012440421 is a deficient number, since it is larger than the sum of its proper divisors (27567751).

2012440421 is an equidigital number, since it uses as much as digits as its factorization.

2012440421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27567750.

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 2012440421 is about 44860.2320658286. The cubic root of 2012440421 is about 1262.5279768463.

Adding to 2012440421 its reverse (1240442102), we get a palindrome (3252882523).

The spelling of 2012440421 in words is "two billion, twelve million, four hundred forty thousand, four hundred twenty-one".