212102112020020 has 24 divisors (see below), whose sum is σ = 445415111563464. Its totient is φ = 84840715984896.

The previous prime is 212102112019999. The next prime is 212102112020063. The reversal of 212102112020020 is 20020211201212.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 518497924624 + 211583614095396 = 720068^2 + 14545914^2 .

It is a super-2 number, since 2×212102112020020² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 212102112019976 and 212102112020003.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6052084 + ... + 21466996.

It is an arithmetic number, because the mean of its divisors is an integer number (18558962981811).

Almost surely, 2^{212102112020020} is an apocalyptic number.

212102112020020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212102112020020 is an abundant number, since it is smaller than the sum of its proper divisors (233312999543444).

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

212102112020020 is a wasteful number, since it uses less digits than its factorization.

212102112020020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16102899 (or 16102897 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 212102112020020 its reverse (20020211201212), we get a palindrome (232122323221232).

The spelling of 212102112020020 in words is "two hundred twelve trillion, one hundred two billion, one hundred twelve million, twenty thousand, twenty".