201202120121 has 2 divisors, whose sum is σ = 201202120122. Its totient is φ = 201202120120.

The previous prime is 201202120109. The next prime is 201202120153. The reversal of 201202120121 is 121021202102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 157128996025 + 44073124096 = 396395^2 + 209936^2 .

It is a cyclic number.

It is not a de Polignac number, because 201202120121 - 2⁶ = 201202120057 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 201202120096 and 201202120105.

It is not a weakly prime, because it can be changed into another prime (201202120181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100601060060 + 100601060061.

It is an arithmetic number, because the mean of its divisors is an integer number (100601060061).

Almost surely, 2^201202120121 is an apocalyptic number.

It is an amenable number.

201202120121 is a deficient number, since it is larger than the sum of its proper divisors (1).

201202120121 is an equidigital number, since it uses as much as digits as its factorization.

201202120121 is an odious number, because the sum of its binary digits is odd.

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

Adding to 201202120121 its reverse (121021202102), we get a palindrome (322223322223).

The spelling of 201202120121 in words is "two hundred one billion, two hundred two million, one hundred twenty thousand, one hundred twenty-one".