42104215121 has 4 divisors (see below), whose sum is σ = 42107871744. Its totient is φ = 42100558500.

The previous prime is 42104215093. The next prime is 42104215169. The reversal of 42104215121 is 12151240124.

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 42104215121 - 2²⁶ = 42037106257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42104215421) 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, 1810985 + ... + 1834086.

It is an arithmetic number, because the mean of its divisors is an integer number (10526967936).

Almost surely, 2^42104215121 is an apocalyptic number.

It is an amenable number.

42104215121 is a deficient number, since it is larger than the sum of its proper divisors (3656623).

42104215121 is a wasteful number, since it uses less digits than its factorization.

42104215121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3656622.

The product of its (nonzero) digits is 640, while the sum is 23.

Adding to 42104215121 its reverse (12151240124), we get a palindrome (54255455245).

The spelling of 42104215121 in words is "forty-two billion, one hundred four million, two hundred fifteen thousand, one hundred twenty-one".