421022023422 has 128 divisors (see below), whose sum is σ = 1161133360128. Its totient is φ = 98216064000.

The previous prime is 421022023343. The next prime is 421022023427. The reversal of 421022023422 is 224320220124.

It is a junction number, because it is equal to n+sod(n) for n = 421022023392 and 421022023401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421022023427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 725079 + ... + 1169522.

It is an arithmetic number, because the mean of its divisors is an integer number (9071354376).

Almost surely, 2^421022023422 is an apocalyptic number.

421022023422 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

421022023422 is an abundant number, since it is smaller than the sum of its proper divisors (740111336706).

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

421022023422 is a wasteful number, since it uses less digits than its factorization.

421022023422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1894674.

The product of its (nonzero) digits is 3072, while the sum is 24.

Adding to 421022023422 its reverse (224320220124), we get a palindrome (645342243546).

The spelling of 421022023422 in words is "four hundred twenty-one billion, twenty-two million, twenty-three thousand, four hundred twenty-two".