212121030120 has 64 divisors (see below), whose sum is σ = 658306656000. Its totient is φ = 54615068928.

The previous prime is 212121030113. The next prime is 212121030151. The reversal of 212121030120 is 21030121212.

It is a super-3 number, since 3×212121030120³ (a number of 35 digits) contains 333 as substring.

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 212121030120.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30473680 + ... + 30480639.

It is an arithmetic number, because the mean of its divisors is an integer number (10286041500).

Almost surely, 2^212121030120 is an apocalyptic number.

212121030120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212121030120 is an abundant number, since it is smaller than the sum of its proper divisors (446185625880).

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

212121030120 is a wasteful number, since it uses less digits than its factorization.

212121030120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60954362 (or 60954358 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 212121030120 its reverse (21030121212), we get a palindrome (233151151332).

The spelling of 212121030120 in words is "two hundred twelve billion, one hundred twenty-one million, thirty thousand, one hundred twenty".