42121814401 has 4 divisors (see below), whose sum is σ = 42126518704. Its totient is φ = 42117110100.

The previous prime is 42121814393. The next prime is 42121814437. The reversal of 42121814401 is 10441812124.

42121814401 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 42121814401 - 2³ = 42121814393 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 42121814401.

It is not an unprimeable number, because it can be changed into a prime (42121814201) 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, 2338695 + ... + 2356636.

It is an arithmetic number, because the mean of its divisors is an integer number (10531629676).

Almost surely, 2^42121814401 is an apocalyptic number.

It is an amenable number.

42121814401 is a deficient number, since it is larger than the sum of its proper divisors (4704303).

42121814401 is an equidigital number, since it uses as much as digits as its factorization.

42121814401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4704302.

The product of its (nonzero) digits is 2048, while the sum is 28.

The spelling of 42121814401 in words is "forty-two billion, one hundred twenty-one million, eight hundred fourteen thousand, four hundred one".