212021200020 has 48 divisors (see below), whose sum is σ = 678467841408. Its totient is φ = 48461988480.

The previous prime is 212021199979. The next prime is 212021200031. The reversal of 212021200020 is 20002120212.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 212021199969 and 212021200005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 252405771 + ... + 252406610.

It is an arithmetic number, because the mean of its divisors is an integer number (14134746696).

Almost surely, 2^212021200020 is an apocalyptic number.

212021200020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212021200020 is an abundant number, since it is smaller than the sum of its proper divisors (466446641388).

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

212021200020 is a wasteful number, since it uses less digits than its factorization.

212021200020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 504812400 (or 504812398 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 212021200020 its reverse (20002120212), we get a palindrome (232023320232).

The spelling of 212021200020 in words is "two hundred twelve billion, twenty-one million, two hundred thousand, twenty".