421000133331320 has 64 divisors (see below), whose sum is σ = 997110425520000. Its totient is φ = 159536117179008.

The previous prime is 421000133331319. The next prime is 421000133331329. The reversal of 421000133331320 is 23133331000124.

It is a super-2 number, since 2×421000133331320² (a number of 30 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 421000133331320.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421000133331329) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 169342631 + ... + 171810729.

It is an arithmetic number, because the mean of its divisors is an integer number (15579850398750).

Almost surely, 2^{421000133331320} is an apocalyptic number.

421000133331320 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

421000133331320 is an abundant number, since it is smaller than the sum of its proper divisors (576110292188680).

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

421000133331320 is a wasteful number, since it uses less digits than its factorization.

421000133331320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2692572 (or 2692568 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 26.

Adding to 421000133331320 its reverse (23133331000124), we get a palindrome (444133464331444).

The spelling of 421000133331320 in words is "four hundred twenty-one trillion, one hundred thirty-three million, three hundred thirty-one thousand, three hundred twenty".