200121220012221 has 24 divisors (see below), whose sum is σ = 301731303793920. Its totient is φ = 127571511599136.

The previous prime is 200121220012213. The next prime is 200121220012229. The reversal of 200121220012221 is 122210022121002.

It is a happy number.

200121220012221 is a `hidden beast` number, since 20 + 0 + 1 + 212 + 200 + 12 + 221 = 666.

It is an interprime number because it is at equal distance from previous prime (200121220012213) and next prime (200121220012229).

It is not a de Polignac number, because 200121220012221 - 2³ = 200121220012213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 200121220012194 and 200121220012203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200121220012229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 158536501 + ... + 159793818.

It is an arithmetic number, because the mean of its divisors is an integer number (12572137658080).

Almost surely, 2^{200121220012221} is an apocalyptic number.

It is an amenable number.

200121220012221 is a deficient number, since it is larger than the sum of its proper divisors (101610083781699).

200121220012221 is a wasteful number, since it uses less digits than its factorization.

200121220012221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318333385 (or 318333382 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 200121220012221 its reverse (122210022121002), we get a palindrome (322331242133223).

The spelling of 200121220012221 in words is "two hundred trillion, one hundred twenty-one billion, two hundred twenty million, twelve thousand, two hundred twenty-one".