42244001421 has 4 divisors (see below), whose sum is σ = 56325335232. Its totient is φ = 28162667612.

The previous prime is 42244001419. The next prime is 42244001441. The reversal of 42244001421 is 12410044224.

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 42244001421 - 2¹ = 42244001419 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42244001391 and 42244001400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42244001441) 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, 7040666901 + ... + 7040666906.

It is an arithmetic number, because the mean of its divisors is an integer number (14081333808).

Almost surely, 2^42244001421 is an apocalyptic number.

It is an amenable number.

42244001421 is a deficient number, since it is larger than the sum of its proper divisors (14081333811).

42244001421 is a wasteful number, since it uses less digits than its factorization.

42244001421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14081333810.

The product of its (nonzero) digits is 2048, while the sum is 24.

Adding to 42244001421 its reverse (12410044224), we get a palindrome (54654045645).

The spelling of 42244001421 in words is "forty-two billion, two hundred forty-four million, one thousand, four hundred twenty-one".