10202121220201 has 2 divisors, whose sum is σ = 10202121220202. Its totient is φ = 10202121220200.

The previous prime is 10202121220163. The next prime is 10202121220267. The reversal of 10202121220201 is 10202212120201.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8305785664576 + 1896335555625 = 2881976^2 + 1377075^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10202121220201 is a prime.

It is a super-2 number, since 2×10202121220201² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (10202121220001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5101060610100 + 5101060610101.

It is an arithmetic number, because the mean of its divisors is an integer number (5101060610101).

Almost surely, 2^{10202121220201} is an apocalyptic number.

It is an amenable number.

10202121220201 is a deficient number, since it is larger than the sum of its proper divisors (1).

10202121220201 is an equidigital number, since it uses as much as digits as its factorization.

10202121220201 is an evil number, because the sum of its binary digits is even.

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

Adding to 10202121220201 its reverse (10202212120201), we get a palindrome (20404333340402).

The spelling of 10202121220201 in words is "ten trillion, two hundred two billion, one hundred twenty-one million, two hundred twenty thousand, two hundred one".