2205420421 has 32 divisors (see below), whose sum is σ = 2542700160. Its totient is φ = 1899749376.

The previous prime is 2205420403. The next prime is 2205420439. The reversal of 2205420421 is 1240245022.

It is an interprime number because it is at equal distance from previous prime (2205420403) and next prime (2205420439).

It is a cyclic number.

It is not a de Polignac number, because 2205420421 - 2²³ = 2197031813 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2205420392 and 2205420401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2205420491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1346415 + ... + 1348051.

It is an arithmetic number, because the mean of its divisors is an integer number (79459380).

Almost surely, 2^2205420421 is an apocalyptic number.

It is an amenable number.

2205420421 is a deficient number, since it is larger than the sum of its proper divisors (337279739).

2205420421 is a wasteful number, since it uses less digits than its factorization.

2205420421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1813.

The product of its (nonzero) digits is 1280, while the sum is 22.

The square root of 2205420421 is about 46961.9039328688. The cubic root of 2205420421 is about 1301.6587152318.

Adding to 2205420421 its reverse (1240245022), we get a palindrome (3445665443).

The spelling of 2205420421 in words is "two billion, two hundred five million, four hundred twenty thousand, four hundred twenty-one".