2021312120200 has 24 divisors (see below), whose sum is σ = 4699550679930. Its totient is φ = 808524848000.

The previous prime is 2021312120183. The next prime is 2021312120209. The reversal of 2021312120200 is 20212131202.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 1436934433284 + 584377686916 = 1198722^2 + 764446^2 .

It is not an unprimeable number, because it can be changed into a prime (2021312120209) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5053280101 + ... + 5053280500.

Almost surely, 2^{2021312120200} is an apocalyptic number.

2021312120200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2021312120200 is an abundant number, since it is smaller than the sum of its proper divisors (2678238559730).

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

2021312120200 is a wasteful number, since it uses less digits than its factorization.

2021312120200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10106560617 (or 10106560608 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 2021312120200 its reverse (20212131202), we get a palindrome (2041524251402).

The spelling of 2021312120200 in words is "two trillion, twenty-one billion, three hundred twelve million, one hundred twenty thousand, two hundred".