421202320220 has 48 divisors (see below), whose sum is σ = 996063215616. Its totient is φ = 148223688000.

The previous prime is 421202320219. The next prime is 421202320247. The reversal of 421202320220 is 22023202124.

It is a super-2 number, since 2×421202320220² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 421202320192 and 421202320201.

It is a congruent number.

It is an unprimeable number.

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, 30873116 + ... + 30886755.

It is an arithmetic number, because the mean of its divisors is an integer number (20751316992).

Almost surely, 2^421202320220 is an apocalyptic number.

It is an amenable number.

421202320220 is an abundant number, since it is smaller than the sum of its proper divisors (574860895396).

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

421202320220 is a wasteful number, since it uses less digits than its factorization.

421202320220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61759922 (or 61759920 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 421202320220 its reverse (22023202124), we get a palindrome (443225522344).

The spelling of 421202320220 in words is "four hundred twenty-one billion, two hundred two million, three hundred twenty thousand, two hundred twenty".