42120055072 has 24 divisors (see below), whose sum is σ = 83090070000. Its totient is φ = 21017815104.

The previous prime is 42120055067. The next prime is 42120055073. The reversal of 42120055072 is 27055002124.

It is a self number, because there is not a number n which added to its sum of digits gives 42120055072.

It is not an unprimeable number, because it can be changed into a prime (42120055073) 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, 1302922 + ... + 1334857.

It is an arithmetic number, because the mean of its divisors is an integer number (3462086250).

Almost surely, 2^42120055072 is an apocalyptic number.

It is an amenable number.

42120055072 is a deficient number, since it is larger than the sum of its proper divisors (40970014928).

42120055072 is a wasteful number, since it uses less digits than its factorization.

42120055072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2638288 (or 2638280 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 28.

Adding to 42120055072 its reverse (27055002124), we get a palindrome (69175057196).

The spelling of 42120055072 in words is "forty-two billion, one hundred twenty million, fifty-five thousand, seventy-two".