202421212422 has 96 divisors (see below), whose sum is σ = 490911533280. Its totient is φ = 55240204800.

The previous prime is 202421212421. The next prime is 202421212447. The reversal of 202421212422 is 224212124202.

It is a junction number, because it is equal to n+sod(n) for n = 202421212392 and 202421212401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202421212421) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 125404 + ... + 648512.

It is an arithmetic number, because the mean of its divisors is an integer number (5113661805).

Almost surely, 2^202421212422 is an apocalyptic number.

202421212422 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 202421212422, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (245455766640).

202421212422 is an abundant number, since it is smaller than the sum of its proper divisors (288490320858).

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

202421212422 is a wasteful number, since it uses less digits than its factorization.

202421212422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 523190 (or 523179 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 24.

Adding to 202421212422 its reverse (224212124202), we get a palindrome (426633336624).

The spelling of 202421212422 in words is "two hundred two billion, four hundred twenty-one million, two hundred twelve thousand, four hundred twenty-two".