212100022020020 has 48 divisors (see below), whose sum is σ = 451073028873600. Its totient is φ = 83766025123200.

The previous prime is 212100022020017. The next prime is 212100022020049. The reversal of 212100022020020 is 20020220001212.

It is a junction number, because it is equal to n+sod(n) for n = 212100022019977 and 212100022020004.

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 15 ways as a sum of consecutive naturals, for example, 145514390 + ... + 146964749.

It is an arithmetic number, because the mean of its divisors is an integer number (9397354768200).

Almost surely, 2^{212100022020020} is an apocalyptic number.

212100022020020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212100022020020 is an abundant number, since it is smaller than the sum of its proper divisors (238973006853580).

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

212100022020020 is a wasteful number, since it uses less digits than its factorization.

212100022020020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292479608 (or 292479606 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 212100022020020 its reverse (20020220001212), we get a palindrome (232120242021232).

The spelling of 212100022020020 in words is "two hundred twelve trillion, one hundred billion, twenty-two million, twenty thousand, twenty".