2021001012200 has 24 divisors (see below), whose sum is σ = 4698827353830. Its totient is φ = 808400404800.

The previous prime is 2021001012197. The next prime is 2021001012203. The reversal of 2021001012200 is 22101001202.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2021001012197) and next prime (2021001012203).

It can be written as a sum of positive squares in 3 ways, for example, as 769560544516 + 1251440467684 = 877246^2 + 1118678^2 .

It is not an unprimeable number, because it can be changed into a prime (2021001012203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5052502331 + ... + 5052502730.

Almost surely, 2^{2021001012200} is an apocalyptic number.

2021001012200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2021001012200 is an abundant number, since it is smaller than the sum of its proper divisors (2677826341630).

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

2021001012200 is a wasteful number, since it uses less digits than its factorization.

2021001012200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10105005077 (or 10105005068 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 2021001012200 its reverse (22101001202), we get a palindrome (2043102013402).

The spelling of 2021001012200 in words is "two trillion, twenty-one billion, one million, twelve thousand, two hundred".