201012220121 has 2 divisors, whose sum is σ = 201012220122. Its totient is φ = 201012220120.

The previous prime is 201012220069. The next prime is 201012220133. The reversal of 201012220121 is 121022210102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 199992312025 + 1019908096 = 447205^2 + 31936^2 .

It is a cyclic number.

It is not a de Polignac number, because 201012220121 - 2¹⁰ = 201012219097 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 201012220096 and 201012220105.

It is not a weakly prime, because it can be changed into another prime (201012220021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100506110060 + 100506110061.

It is an arithmetic number, because the mean of its divisors is an integer number (100506110061).

Almost surely, 2^201012220121 is an apocalyptic number.

It is an amenable number.

201012220121 is a deficient number, since it is larger than the sum of its proper divisors (1).

201012220121 is an equidigital number, since it uses as much as digits as its factorization.

201012220121 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 201012220121 its reverse (121022210102), we get a palindrome (322034430223).

The spelling of 201012220121 in words is "two hundred one billion, twelve million, two hundred twenty thousand, one hundred twenty-one".