42104311421 has 4 divisors (see below), whose sum is σ = 42104950272. Its totient is φ = 42103672572.

The previous prime is 42104311399. The next prime is 42104311433. The reversal of 42104311421 is 12411340124.

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-42104311421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42104311481) 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, 207491 + ... + 356736.

It is an arithmetic number, because the mean of its divisors is an integer number (10526237568).

Almost surely, 2^42104311421 is an apocalyptic number.

It is an amenable number.

42104311421 is a deficient number, since it is larger than the sum of its proper divisors (638851).

42104311421 is an equidigital number, since it uses as much as digits as its factorization.

42104311421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 638850.

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

Adding to 42104311421 its reverse (12411340124), we get a palindrome (54515651545).

The spelling of 42104311421 in words is "forty-two billion, one hundred four million, three hundred eleven thousand, four hundred twenty-one".