121221002020201 has 8 divisors (see below), whose sum is σ = 122333898198600. Its totient is φ = 120108119967360.

The previous prime is 121221002020177. The next prime is 121221002020229. The reversal of 121221002020201 is 102020200122121.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 45757919091600 + 75463082928601 = 6764460^2 + 8686949^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121221002020201 - 2¹¹ = 121221002018153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121221002020241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14113605 + ... + 21015133.

It is an arithmetic number, because the mean of its divisors is an integer number (15291737274825).

Almost surely, 2^{121221002020201} is an apocalyptic number.

It is an amenable number.

121221002020201 is a deficient number, since it is larger than the sum of its proper divisors (1112896178399).

121221002020201 is a wasteful number, since it uses less digits than its factorization.

121221002020201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7062779.

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

Adding to 121221002020201 its reverse (102020200122121), we get a palindrome (223241202142322).

The spelling of 121221002020201 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, two million, twenty thousand, two hundred one".