421440424120209 has 8 divisors (see below), whose sum is σ = 605145224377792. Its totient is φ = 259347953304720.

The previous prime is 421440424120207. The next prime is 421440424120211. The reversal of 421440424120209 is 902021424044124.

It is an interprime number because it is at equal distance from previous prime (421440424120207) and next prime (421440424120211).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 421440424120209 - 2¹ = 421440424120207 is a prime.

It is a super-2 number, since 2×421440424120209² (a number of 30 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 10806164721031 = 421440424120209 / (4 + 2 + 1 + 4 + 4 + 0 + 4 + 2 + 4 + 1 + 2 + 0 + 2 + 0 + 9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421440424120207) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5403082360477 + ... + 5403082360554.

It is an arithmetic number, because the mean of its divisors is an integer number (75643153047224).

Almost surely, 2^{421440424120209} is an apocalyptic number.

It is an amenable number.

421440424120209 is a deficient number, since it is larger than the sum of its proper divisors (183704800257583).

421440424120209 is a wasteful number, since it uses less digits than its factorization.

421440424120209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10806164721047.

The product of its (nonzero) digits is 147456, while the sum is 39.

The spelling of 421440424120209 in words is "four hundred twenty-one trillion, four hundred forty billion, four hundred twenty-four million, one hundred twenty thousand, two hundred nine".