42044131421 has 4 divisors (see below), whose sum is σ = 42071739072. Its totient is φ = 42016523772.

The previous prime is 42044131403. The next prime is 42044131489. The reversal of 42044131421 is 12413144024.

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 42044131421 - 2¹⁴ = 42044115037 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 (42044131321) 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, 13801541 + ... + 13804586.

It is an arithmetic number, because the mean of its divisors is an integer number (10517934768).

Almost surely, 2^42044131421 is an apocalyptic number.

It is an amenable number.

42044131421 is a deficient number, since it is larger than the sum of its proper divisors (27607651).

42044131421 is a wasteful number, since it uses less digits than its factorization.

42044131421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27607650.

The product of its (nonzero) digits is 3072, while the sum is 26.

Adding to 42044131421 its reverse (12413144024), we get a palindrome (54457275445).

The spelling of 42044131421 in words is "forty-two billion, forty-four million, one hundred thirty-one thousand, four hundred twenty-one".