212102120020 has 48 divisors (see below), whose sum is σ = 509072110848. Its totient is φ = 72716866560.

The previous prime is 212102120017. The next prime is 212102120023. The reversal of 212102120020 is 20021201212.

It is a happy number.

212102120020 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (212102120017) and next prime (212102120023).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212102120023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4190665 + ... + 4240975.

It is an arithmetic number, because the mean of its divisors is an integer number (10605668976).

Almost surely, 2^212102120020 is an apocalyptic number.

212102120020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212102120020 is an abundant number, since it is smaller than the sum of its proper divisors (296969990828).

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

212102120020 is a wasteful number, since it uses less digits than its factorization.

212102120020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80440 (or 80438 counting only the distinct ones).

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

Adding to 212102120020 its reverse (20021201212), we get a palindrome (232123321232).

The spelling of 212102120020 in words is "two hundred twelve billion, one hundred two million, one hundred twenty thousand, twenty".