421013320400 has 30 divisors (see below), whose sum is σ = 1011484503222. Its totient is φ = 168405328000.

The previous prime is 421013320391. The next prime is 421013320421. The reversal of 421013320400 is 4023310124.

It can be written as a sum of positive squares in 3 ways, for example, as 8366395024 + 412646925376 = 91468^2 + 642376^2 .

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 526266251 + ... + 526267050.

Almost surely, 2^421013320400 is an apocalyptic number.

421013320400 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

421013320400 is an abundant number, since it is smaller than the sum of its proper divisors (590471182822).

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

421013320400 is a wasteful number, since it uses less digits than its factorization.

421013320400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1052533319 (or 1052533308 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 421013320400 its reverse (4023310124), we get a palindrome (425036630524).

The spelling of 421013320400 in words is "four hundred twenty-one billion, thirteen million, three hundred twenty thousand, four hundred".