213120420 has 96 divisors (see below), whose sum is σ = 629233920. Its totient is φ = 53813760.

The previous prime is 213120409. The next prime is 213120451. The reversal of 213120420 is 24021312.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 213120420.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 91065 + ... + 93375.

It is an arithmetic number, because the mean of its divisors is an integer number (6554520).

Almost surely, 2^213120420 is an apocalyptic number.

213120420 is a gapful number since it is divisible by the number (20) 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 213120420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (314616960).

213120420 is an abundant number, since it is smaller than the sum of its proper divisors (416113500).

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

213120420 is a wasteful number, since it uses less digits than its factorization.

213120420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2405 (or 2403 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 213120420 is about 14598.6444576200. The cubic root of 213120420 is about 597.3217852862.

Adding to 213120420 its reverse (24021312), we get a palindrome (237141732).

The spelling of 213120420 in words is "two hundred thirteen million, one hundred twenty thousand, four hundred twenty".