212201022020 has 96 divisors (see below), whose sum is σ = 508673517408. Its totient is φ = 73663414272.

The previous prime is 212201022013. The next prime is 212201022049. The reversal of 212201022020 is 20220102212.

It can be written as a sum of positive squares in 16 ways, for example, as 37804580356 + 174396441664 = 194434^2 + 417608^2 .

It is a junction number, because it is equal to n+sod(n) for n = 212201021986 and 212201022004.

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, 4187072 + ... + 4237448.

It is an arithmetic number, because the mean of its divisors is an integer number (5298682473).

Almost surely, 2^212201022020 is an apocalyptic number.

212201022020 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 212201022020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (254336758704).

212201022020 is an abundant number, since it is smaller than the sum of its proper divisors (296472495388).

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

212201022020 is a wasteful number, since it uses less digits than its factorization.

212201022020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51369 (or 51367 counting only the distinct ones).

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

Adding to 212201022020 its reverse (20220102212), we get a palindrome (232421124232).

The spelling of 212201022020 in words is "two hundred twelve billion, two hundred one million, twenty-two thousand, twenty".