421021120 has 56 divisors (see below), whose sum is σ = 1079686944. Its totient is φ = 155452416.

The previous prime is 421021103. The next prime is 421021121. The reversal of 421021120 is 21120124.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a self number, because there is not a number n which added to its sum of digits gives 421021120.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421021121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46444 + ... + 54763.

It is an arithmetic number, because the mean of its divisors is an integer number (19280124).

Almost surely, 2^421021120 is an apocalyptic number.

421021120 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

421021120 is an abundant number, since it is smaller than the sum of its proper divisors (658665824).

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

421021120 is a wasteful number, since it uses less digits than its factorization.

421021120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101237 (or 101227 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 421021120 is about 20518.7991851375. The cubic root of 421021120 is about 749.4936552673.

Adding to 421021120 its reverse (21120124), we get a palindrome (442141244).

The spelling of 421021120 in words is "four hundred twenty-one million, twenty-one thousand, one hundred twenty".