42209672421 has 32 divisors (see below), whose sum is σ = 64575952128. Its totient is φ = 24023831040.

The previous prime is 42209672411. The next prime is 42209672431. The reversal of 42209672421 is 12427690224.

It is an interprime number because it is at equal distance from previous prime (42209672411) and next prime (42209672431).

It is not a de Polignac number, because 42209672421 - 2¹³ = 42209664229 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42209672421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42209672411) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6341131 + ... + 6347783.

It is an arithmetic number, because the mean of its divisors is an integer number (2017998504).

Almost surely, 2^42209672421 is an apocalyptic number.

It is an amenable number.

42209672421 is a deficient number, since it is larger than the sum of its proper divisors (22366279707).

42209672421 is a wasteful number, since it uses less digits than its factorization.

42209672421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7821.

The product of its (nonzero) digits is 96768, while the sum is 39.

The spelling of 42209672421 in words is "forty-two billion, two hundred nine million, six hundred seventy-two thousand, four hundred twenty-one".