212120202210020 has 96 divisors (see below), whose sum is σ = 496413741045600. Its totient is φ = 75597142892544.

The previous prime is 212120202210011. The next prime is 212120202210089. The reversal of 212120202210020 is 20012202021212.

It is a happy number.

It can be written as a sum of positive squares in 16 ways, for example, as 28918130043364 + 183202072166656 = 5377558^2 + 13535216^2 .

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, 19990412 + ... + 28702908.

It is an arithmetic number, because the mean of its divisors is an integer number (5170976469225).

Almost surely, 2^{212120202210020} is an apocalyptic number.

212120202210020 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 212120202210020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (248206870522800).

212120202210020 is an abundant number, since it is smaller than the sum of its proper divisors (284293538835580).

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

212120202210020 is a wasteful number, since it uses less digits than its factorization.

212120202210020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8715777 (or 8715775 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 212120202210020 its reverse (20012202021212), we get a palindrome (232132404231232).

The spelling of 212120202210020 in words is "two hundred twelve trillion, one hundred twenty billion, two hundred two million, two hundred ten thousand, twenty".