421232221000 has 128 divisors (see below), whose sum is σ = 1031963587200. Its totient is φ = 160721836800.

The previous prime is 421232220979. The next prime is 421232221013. The reversal of 421232221000 is 122232124.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 2319499 + ... + 2494501.

It is an arithmetic number, because the mean of its divisors is an integer number (8062215525).

Almost surely, 2^421232221000 is an apocalyptic number.

421232221000 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 421232221000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (515981793600).

421232221000 is an abundant number, since it is smaller than the sum of its proper divisors (610731366200).

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

421232221000 is a wasteful number, since it uses less digits than its factorization.

421232221000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175136 (or 175122 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 421232221000 its reverse (122232124), we get a palindrome (421354453124).

The spelling of 421232221000 in words is "four hundred twenty-one billion, two hundred thirty-two million, two hundred twenty-one thousand".