42040220312421 has 12 divisors (see below), whose sum is σ = 61493430556480. Its totient is φ = 27672043749480.

The previous prime is 42040220312413. The next prime is 42040220312423. The reversal of 42040220312421 is 12421302204024.

It is a happy number.

42040220312421 is a `hidden beast` number, since 4 + 2 + 0 + 4 + 0 + 220 + 3 + 12 + 421 = 666.

It is not a de Polignac number, because 42040220312421 - 2³ = 42040220312413 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 (42040220312423) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29564148595 + ... + 29564150016.

Almost surely, 2^{42040220312421} is an apocalyptic number.

It is an amenable number.

42040220312421 is a deficient number, since it is larger than the sum of its proper divisors (19453210244059).

42040220312421 is a wasteful number, since it uses less digits than its factorization.

42040220312421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59128298696 (or 59128298693 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

Adding to 42040220312421 its reverse (12421302204024), we get a palindrome (54461522516445).

The spelling of 42040220312421 in words is "forty-two trillion, forty billion, two hundred twenty million, three hundred twelve thousand, four hundred twenty-one".