42021121422 has 32 divisors (see below), whose sum is σ = 96054624000. Its totient is φ = 12005241408.

The previous prime is 42021121421. The next prime is 42021121447. The reversal of 42021121422 is 22412112024.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42021121421) 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, 963954 + ... + 1006602.

It is an arithmetic number, because the mean of its divisors is an integer number (3001707000).

Almost surely, 2^42021121422 is an apocalyptic number.

42021121422 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

42021121422 is an abundant number, since it is smaller than the sum of its proper divisors (54033502578).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42021121422 is a wasteful number, since it uses less digits than its factorization.

42021121422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66120.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 42021121422 its reverse (22412112024), we get a palindrome (64433233446).

The spelling of 42021121422 in words is "forty-two billion, twenty-one million, one hundred twenty-one thousand, four hundred twenty-two".