42120221204 has 12 divisors (see below), whose sum is σ = 75424582464. Its totient is φ = 20570340504.

The previous prime is 42120221183. The next prime is 42120221249. The reversal of 42120221204 is 40212202124.

It is a super-3 number, since 3×42120221204³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122442332 + ... + 122442675.

It is an arithmetic number, because the mean of its divisors is an integer number (6285381872).

Almost surely, 2^42120221204 is an apocalyptic number.

It is an amenable number.

42120221204 is a deficient number, since it is larger than the sum of its proper divisors (33304361260).

42120221204 is a wasteful number, since it uses less digits than its factorization.

42120221204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244885054 (or 244885052 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 42120221204 its reverse (40212202124), we get a palindrome (82332423328).

The spelling of 42120221204 in words is "forty-two billion, one hundred twenty million, two hundred twenty-one thousand, two hundred four".