421120240309 has 4 divisors (see below), whose sum is σ = 421296961216. Its totient is φ = 420943519404.

The previous prime is 421120240243. The next prime is 421120240337. The reversal of 421120240309 is 903042021124.

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 421120240309 - 2¹⁷ = 421120109237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421120241309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88356879 + ... + 88361644.

It is an arithmetic number, because the mean of its divisors is an integer number (105324240304).

Almost surely, 2^421120240309 is an apocalyptic number.

It is an amenable number.

421120240309 is a deficient number, since it is larger than the sum of its proper divisors (176720907).

421120240309 is a wasteful number, since it uses less digits than its factorization.

421120240309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176720906.

The product of its (nonzero) digits is 3456, while the sum is 28.

The spelling of 421120240309 in words is "four hundred twenty-one billion, one hundred twenty million, two hundred forty thousand, three hundred nine".