212403304124020 has 12 divisors (see below), whose sum is σ = 446046938660484. Its totient is φ = 84961321649600.

The previous prime is 212403304124009. The next prime is 212403304124021. The reversal of 212403304124020 is 20421403304212.

It can be written as a sum of positive squares in 2 ways, for example, as 40511748333456 + 171891555790564 = 6364884^2 + 13110742^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 212403304124020.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212403304124021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5310082603081 + ... + 5310082603120.

It is an arithmetic number, because the mean of its divisors is an integer number (37170578221707).

Almost surely, 2^{212403304124020} is an apocalyptic number.

212403304124020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212403304124020 is an abundant number, since it is smaller than the sum of its proper divisors (233643634536464).

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

212403304124020 is a wasteful number, since it uses less digits than its factorization.

212403304124020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10620165206210 (or 10620165206208 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 212403304124020 its reverse (20421403304212), we get a palindrome (232824707428232).

The spelling of 212403304124020 in words is "two hundred twelve trillion, four hundred three billion, three hundred four million, one hundred twenty-four thousand, twenty".