2001422421 has 12 divisors (see below), whose sum is σ = 2961454860. Its totient is φ = 1301737920.

The previous prime is 2001422417. The next prime is 2001422429. The reversal of 2001422421 is 1242241002.

2001422421 is a `hidden beast` number, since 200 + 1 + 42 + 2 + 421 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 33524100 + 1967898321 = 5790^2 + 44361^2 .

It is not a de Polignac number, because 2001422421 - 2² = 2001422417 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2001422394 and 2001422403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001422429) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2711586 + ... + 2712323.

It is an arithmetic number, because the mean of its divisors is an integer number (246787905).

Almost surely, 2^2001422421 is an apocalyptic number.

It is an amenable number.

2001422421 is a deficient number, since it is larger than the sum of its proper divisors (960032439).

2001422421 is a wasteful number, since it uses less digits than its factorization.

2001422421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5423956 (or 5423953 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 2001422421 is about 44737.2598736221. The cubic root of 2001422421 is about 1260.2196688057.

Adding to 2001422421 its reverse (1242241002), we get a palindrome (3243663423).

The spelling of 2001422421 in words is "two billion, one million, four hundred twenty-two thousand, four hundred twenty-one".