201202012102121 has 2 divisors, whose sum is σ = 201202012102122. Its totient is φ = 201202012102120.

The previous prime is 201202012102093. The next prime is 201202012102127. The reversal of 201202012102121 is 121201210202102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 168278102562025 + 32923909540096 = 12972205^2 + 5737936^2 .

It is a cyclic number.

It is not a de Polignac number, because 201202012102121 - 2³⁰ = 201200938360297 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 201202012102121.

It is not a weakly prime, because it can be changed into another prime (201202012102127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100601006051060 + 100601006051061.

It is an arithmetic number, because the mean of its divisors is an integer number (100601006051061).

Almost surely, 2^{201202012102121} is an apocalyptic number.

It is an amenable number.

201202012102121 is a deficient number, since it is larger than the sum of its proper divisors (1).

201202012102121 is an equidigital number, since it uses as much as digits as its factorization.

201202012102121 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 17.

Adding to 201202012102121 its reverse (121201210202102), we get a palindrome (322403222304223).

The spelling of 201202012102121 in words is "two hundred one trillion, two hundred two billion, twelve million, one hundred two thousand, one hundred twenty-one".