102121120210121 has 2 divisors, whose sum is σ = 102121120210122. Its totient is φ = 102121120210120.

The previous prime is 102121120210079. The next prime is 102121120210171. The reversal of 102121120210121 is 121012021121201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 94473345667600 + 7647774542521 = 9719740^2 + 2765461^2 .

It is a cyclic number.

It is not a de Polignac number, because 102121120210121 - 2¹⁴ = 102121120193737 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 102121120210121.

It is not a weakly prime, because it can be changed into another prime (102121120210171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51060560105060 + 51060560105061.

It is an arithmetic number, because the mean of its divisors is an integer number (51060560105061).

Almost surely, 2^{102121120210121} is an apocalyptic number.

It is an amenable number.

102121120210121 is a deficient number, since it is larger than the sum of its proper divisors (1).

102121120210121 is an equidigital number, since it uses as much as digits as its factorization.

102121120210121 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 17.

Adding to 102121120210121 its reverse (121012021121201), we get a palindrome (223133141331322).

The spelling of 102121120210121 in words is "one hundred two trillion, one hundred twenty-one billion, one hundred twenty million, two hundred ten thousand, one hundred twenty-one".