10001210220121 has 2 divisors, whose sum is σ = 10001210220122. Its totient is φ = 10001210220120.

The previous prime is 10001210220101. The next prime is 10001210220143. The reversal of 10001210220121 is 12102201210001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6267832702096 + 3733377518025 = 2503564^2 + 1932195^2 .

It is a cyclic number.

It is not a de Polignac number, because 10001210220121 - 2¹³ = 10001210211929 is a prime.

It is not a weakly prime, because it can be changed into another prime (10001210220101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5000605110060 + 5000605110061.

It is an arithmetic number, because the mean of its divisors is an integer number (5000605110061).

Almost surely, 2^{10001210220121} is an apocalyptic number.

It is an amenable number.

10001210220121 is a deficient number, since it is larger than the sum of its proper divisors (1).

10001210220121 is an equidigital number, since it uses as much as digits as its factorization.

10001210220121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 10001210220121 its reverse (12102201210001), we get a palindrome (22103411430122).

The spelling of 10001210220121 in words is "ten trillion, one billion, two hundred ten million, two hundred twenty thousand, one hundred twenty-one".