42401413121 has 4 divisors (see below), whose sum is σ = 43120081200. Its totient is φ = 41682745044.

The previous prime is 42401413111. The next prime is 42401413127. The reversal of 42401413121 is 12131410424.

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 a de Polignac number, because none of the positive numbers 2^k-42401413121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42401413127) 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, 359333951 + ... + 359334068.

It is an arithmetic number, because the mean of its divisors is an integer number (10780020300).

Almost surely, 2^42401413121 is an apocalyptic number.

It is an amenable number.

42401413121 is a deficient number, since it is larger than the sum of its proper divisors (718668079).

42401413121 is an equidigital number, since it uses as much as digits as its factorization.

42401413121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 718668078.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 42401413121 its reverse (12131410424), we get a palindrome (54532823545).

The spelling of 42401413121 in words is "forty-two billion, four hundred one million, four hundred thirteen thousand, one hundred twenty-one".