212020200021 has 32 divisors (see below), whose sum is σ = 333598867456. Its totient is φ = 117211536000.

The previous prime is 212020200019. The next prime is 212020200047. The reversal of 212020200021 is 120002020212.

It is not a de Polignac number, because 212020200021 - 2¹ = 212020200019 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212020200521) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2239281 + ... + 2332041.

It is an arithmetic number, because the mean of its divisors is an integer number (10424964608).

Almost surely, 2^212020200021 is an apocalyptic number.

212020200021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

212020200021 is a deficient number, since it is larger than the sum of its proper divisors (121578667435).

212020200021 is a wasteful number, since it uses less digits than its factorization.

212020200021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96313.

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

Adding to 212020200021 its reverse (120002020212), we get a palindrome (332022220233).

The spelling of 212020200021 in words is "two hundred twelve billion, twenty million, two hundred thousand, twenty-one".