2021212200020 has 24 divisors (see below), whose sum is σ = 4571049129864. Its totient is φ = 746293735296.

The previous prime is 2021212199989. The next prime is 2021212200043. The reversal of 2021212200020 is 200022121202.

It can be written as a sum of positive squares in 4 ways, for example, as 71044637764 + 1950167562256 = 266542^2 + 1396484^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2021212199968 and 2021212200004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3886946279 + ... + 3886946798.

It is an arithmetic number, because the mean of its divisors is an integer number (190460380411).

Almost surely, 2^{2021212200020} is an apocalyptic number.

2021212200020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2021212200020 is an abundant number, since it is smaller than the sum of its proper divisors (2549836929844).

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

2021212200020 is a wasteful number, since it uses less digits than its factorization.

2021212200020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7773893099 (or 7773893097 counting only the distinct ones).

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

Adding to 2021212200020 its reverse (200022121202), we get a palindrome (2221234321222).

The spelling of 2021212200020 in words is "two trillion, twenty-one billion, two hundred twelve million, two hundred thousand, twenty".