42020402221 has 12 divisors (see below), whose sum is σ = 49569343200. Its totient is φ = 35510196120.

The previous prime is 42020402197. The next prime is 42020402227. The reversal of 42020402221 is 12220402024.

It is not a de Polignac number, because 42020402221 - 2⁵ = 42020402189 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 (42020402227) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 6035671 + ... + 6042628.

It is an arithmetic number, because the mean of its divisors is an integer number (4130778600).

Almost surely, 2^42020402221 is an apocalyptic number.

It is an amenable number.

42020402221 is a deficient number, since it is larger than the sum of its proper divisors (7548940979).

42020402221 is a wasteful number, since it uses less digits than its factorization.

42020402221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12078384 (or 12078377 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 19.

Adding to 42020402221 its reverse (12220402024), we get a palindrome (54240804245).

The spelling of 42020402221 in words is "forty-two billion, twenty million, four hundred two thousand, two hundred twenty-one".