421265264354220 has 192 divisors, whose sum is σ = 1386324275212800. Its totient is φ = 94230526310400.

The previous prime is 421265264354189. The next prime is 421265264354239. The reversal of 421265264354220 is 22453462562124.

It is a self number, because there is not a number n which added to its sum of digits gives 421265264354220.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 10886731 + ... + 31000829.

It is an arithmetic number, because the mean of its divisors is an integer number (7220438933400).

Almost surely, 2^{421265264354220} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 421265264354220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (693162137606400).

421265264354220 is an abundant number, since it is smaller than the sum of its proper divisors (965059010858580).

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

421265264354220 is a wasteful number, since it uses less digits than its factorization.

421265264354220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20116576 (or 20116574 counting only the distinct ones).

The product of its (nonzero) digits is 5529600, while the sum is 48.

The spelling of 421265264354220 in words is "four hundred twenty-one trillion, two hundred sixty-five billion, two hundred sixty-four million, three hundred fifty-four thousand, two hundred twenty".