421100120 has 96 divisors (see below), whose sum is σ = 1109188080. Its totient is φ = 143458560.

The previous prime is 421100117. The next prime is 421100171. The reversal of 421100120 is 21001124.

It is a super-2 number, since 2×421100120² = 354650622128028800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 354167 + ... + 355353.

Almost surely, 2^421100120 is an apocalyptic number.

421100120 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 421100120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (554594040).

421100120 is an abundant number, since it is smaller than the sum of its proper divisors (688087960).

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

421100120 is a wasteful number, since it uses less digits than its factorization.

421100120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1393 (or 1382 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 421100120 is about 20520.7241587620. The cubic root of 421100120 is about 749.5405304263.

Adding to 421100120 its reverse (21001124), we get a palindrome (442101244).

The spelling of 421100120 in words is "four hundred twenty-one million, one hundred thousand, one hundred twenty".