102021212002121 has 2 divisors, whose sum is σ = 102021212002122. Its totient is φ = 102021212002120.

The previous prime is 102021212002117. The next prime is 102021212002123. The reversal of 102021212002121 is 121200212120201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 100266477289225 + 1754734712896 = 10013315^2 + 1324664^2 .

It is a cyclic number.

It is not a de Polignac number, because 102021212002121 - 2² = 102021212002117 is a prime.

Together with 102021212002123, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 102021212002121.

It is not a weakly prime, because it can be changed into another prime (102021212002123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51010606001060 + 51010606001061.

It is an arithmetic number, because the mean of its divisors is an integer number (51010606001061).

Almost surely, 2^{102021212002121} is an apocalyptic number.

It is an amenable number.

102021212002121 is a deficient number, since it is larger than the sum of its proper divisors (1).

102021212002121 is an equidigital number, since it uses as much as digits as its factorization.

102021212002121 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 102021212002121 its reverse (121200212120201), we get a palindrome (223221424122322).

The spelling of 102021212002121 in words is "one hundred two trillion, twenty-one billion, two hundred twelve million, two thousand, one hundred twenty-one".