42479211921 has 4 divisors (see below), whose sum is σ = 56638949232. Its totient is φ = 28319474612.

The previous prime is 42479211917. The next prime is 42479211923. The reversal of 42479211921 is 12911297424.

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 42479211921 - 2² = 42479211917 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42479211923) 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, 7079868651 + ... + 7079868656.

It is an arithmetic number, because the mean of its divisors is an integer number (14159737308).

Almost surely, 2^42479211921 is an apocalyptic number.

It is an amenable number.

42479211921 is a deficient number, since it is larger than the sum of its proper divisors (14159737311).

42479211921 is a wasteful number, since it uses less digits than its factorization.

42479211921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14159737310.

The product of its digits is 72576, while the sum is 42.

The spelling of 42479211921 in words is "forty-two billion, four hundred seventy-nine million, two hundred eleven thousand, nine hundred twenty-one".