421010100 has 216 divisors, whose sum is σ = 1597272768. Its totient is φ = 90547200.

The previous prime is 421010071. The next prime is 421010123. The reversal of 421010100 is 1010124.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 105135 + ... + 109065.

Almost surely, 2^421010100 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 421010100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (798636384).

421010100 is an abundant number, since it is smaller than the sum of its proper divisors (1176262668).

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

421010100 is a wasteful number, since it uses less digits than its factorization.

421010100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3975 (or 3965 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 421010100 is about 20518.5306491474. The cubic root of 421010100 is about 749.4871160133.

Adding to 421010100 its reverse (1010124), we get a palindrome (422020224).

The spelling of 421010100 in words is "four hundred twenty-one million, ten thousand, one hundred".