42420032221 has 16 divisors (see below), whose sum is σ = 53563624704. Its totient is φ = 32733321984.

The previous prime is 42420032201. The next prime is 42420032227. The reversal of 42420032221 is 12223002424.

It is a cyclic number.

It is not a de Polignac number, because 42420032221 - 2¹⁷ = 42419901149 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42420032192 and 42420032201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42420032227) 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 15 ways as a sum of consecutive naturals, for example, 7746630 + ... + 7752103.

It is an arithmetic number, because the mean of its divisors is an integer number (3347726544).

Almost surely, 2^42420032221 is an apocalyptic number.

It is an amenable number.

42420032221 is a deficient number, since it is larger than the sum of its proper divisors (11143592483).

42420032221 is a wasteful number, since it uses less digits than its factorization.

42420032221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15498780.

The product of its (nonzero) digits is 1536, while the sum is 22.

Adding to 42420032221 its reverse (12223002424), we get a palindrome (54643034645).

The spelling of 42420032221 in words is "forty-two billion, four hundred twenty million, thirty-two thousand, two hundred twenty-one".