10201222121 has 2 divisors, whose sum is σ = 10201222122. Its totient is φ = 10201222120.

The previous prime is 10201222081. The next prime is 10201222139. The reversal of 10201222121 is 12122210201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9840640000 + 360582121 = 99200^2 + 18989^2 .

It is a cyclic number.

It is not a de Polignac number, because 10201222121 - 2¹⁰ = 10201221097 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10201222096 and 10201222105.

It is not a weakly prime, because it can be changed into another prime (10201222021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5100611060 + 5100611061.

It is an arithmetic number, because the mean of its divisors is an integer number (5100611061).

Almost surely, 2^10201222121 is an apocalyptic number.

It is an amenable number.

10201222121 is a deficient number, since it is larger than the sum of its proper divisors (1).

10201222121 is an equidigital number, since it uses as much as digits as its factorization.

10201222121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 10201222121 its reverse (12122210201), we get a palindrome (22323432322).

The spelling of 10201222121 in words is "ten billion, two hundred one million, two hundred twenty-two thousand, one hundred twenty-one".