42321420209 has 4 divisors (see below), whose sum is σ = 42443384304. Its totient is φ = 42199456116.

The previous prime is 42321420191. The next prime is 42321420217. The reversal of 42321420209 is 90202412324.

It is a happy number.

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 42321420209 - 2¹² = 42321416113 is a prime.

It is a super-2 number, since 2×42321420209² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42321420269) 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, 60981527 + ... + 60982220.

It is an arithmetic number, because the mean of its divisors is an integer number (10610846076).

Almost surely, 2^42321420209 is an apocalyptic number.

It is an amenable number.

42321420209 is a deficient number, since it is larger than the sum of its proper divisors (121964095).

42321420209 is a wasteful number, since it uses less digits than its factorization.

42321420209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121964094.

The product of its (nonzero) digits is 6912, while the sum is 29.

The spelling of 42321420209 in words is "forty-two billion, three hundred twenty-one million, four hundred twenty thousand, two hundred nine".