200212122001021 has 4 divisors (see below), whose sum is σ = 215613054462652. Its totient is φ = 184811189539392.

The previous prime is 200212122000949. The next prime is 200212122001033. The reversal of 200212122001021 is 120100221212002.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 131996316771225 + 68215805229796 = 11488965^2 + 8259286^2 .

It is not a de Polignac number, because 200212122001021 - 2¹⁹ = 200212121476733 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 200212122000986 and 200212122001004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200212122001621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7700466230796 + ... + 7700466230821.

It is an arithmetic number, because the mean of its divisors is an integer number (53903263615663).

Almost surely, 2^{200212122001021} is an apocalyptic number.

It is an amenable number.

200212122001021 is a deficient number, since it is larger than the sum of its proper divisors (15400932461631).

200212122001021 is a wasteful number, since it uses less digits than its factorization.

200212122001021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15400932461630.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 200212122001021 its reverse (120100221212002), we get a palindrome (320312343213023).

The spelling of 200212122001021 in words is "two hundred trillion, two hundred twelve billion, one hundred twenty-two million, one thousand, twenty-one".