42121043441 has 4 divisors (see below), whose sum is σ = 42122232384. Its totient is φ = 42119854500.

The previous prime is 42121043413. The next prime is 42121043467. The reversal of 42121043441 is 14434012124.

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 42121043441 - 2¹⁴ = 42121027057 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42121043441.

It is not an unprimeable number, because it can be changed into a prime (42121043401) 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, 539645 + ... + 612746.

It is an arithmetic number, because the mean of its divisors is an integer number (10530558096).

Almost surely, 2^42121043441 is an apocalyptic number.

It is an amenable number.

42121043441 is a deficient number, since it is larger than the sum of its proper divisors (1188943).

42121043441 is a wasteful number, since it uses less digits than its factorization.

42121043441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1188942.

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

Adding to 42121043441 its reverse (14434012124), we get a palindrome (56555055565).

The spelling of 42121043441 in words is "forty-two billion, one hundred twenty-one million, forty-three thousand, four hundred forty-one".