212130021120 has 72 divisors (see below), whose sum is σ = 677490267216. Its totient is φ = 56568004608.

The previous prime is 212130021119. The next prime is 212130021149. The reversal of 212130021120 is 21120031212.

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 212130021120.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27617257 + ... + 27624936.

Almost surely, 2^212130021120 is an apocalyptic number.

212130021120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212130021120 is an abundant number, since it is smaller than the sum of its proper divisors (465360246096).

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

212130021120 is an equidigital number, since it uses as much as digits as its factorization.

212130021120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55242217 (or 55242203 counting only the distinct ones).

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

Adding to 212130021120 its reverse (21120031212), we get a palindrome (233250052332).

The spelling of 212130021120 in words is "two hundred twelve billion, one hundred thirty million, twenty-one thousand, one hundred twenty".