200212201221121 has 4 divisors (see below), whose sum is σ = 201487438171732. Its totient is φ = 198936964270512.

The previous prime is 200212201221041. The next prime is 200212201221139. The reversal of 200212201221121 is 121122102212002.

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 151082545566096 + 49129655655025 = 12291564^2 + 7009255^2 .

It is a cyclic number.

It is not a de Polignac number, because 200212201221121 - 2¹¹ = 200212201219073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (200212201221421) 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, 637618475070 + ... + 637618475383.

It is an arithmetic number, because the mean of its divisors is an integer number (50371859542933).

Almost surely, 2^{200212201221121} is an apocalyptic number.

It is an amenable number.

200212201221121 is a deficient number, since it is larger than the sum of its proper divisors (1275236950611).

200212201221121 is a wasteful number, since it uses less digits than its factorization.

200212201221121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1275236950610.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 200212201221121 its reverse (121122102212002), we get a palindrome (321334303433123).

The spelling of 200212201221121 in words is "two hundred trillion, two hundred twelve billion, two hundred one million, two hundred twenty-one thousand, one hundred twenty-one".