102102120121 has 2 divisors, whose sum is σ = 102102120122. Its totient is φ = 102102120120.

The previous prime is 102102120103. The next prime is 102102120163. The reversal of 102102120121 is 121021201201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66945870121 + 35156250000 = 258739^2 + 187500^2 .

It is a cyclic number.

It is not a de Polignac number, because 102102120121 - 2⁷ = 102102119993 is a prime.

It is a super-2 number, since 2×102102120121² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (102102126121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51051060060 + 51051060061.

It is an arithmetic number, because the mean of its divisors is an integer number (51051060061).

Almost surely, 2^102102120121 is an apocalyptic number.

It is an amenable number.

102102120121 is a deficient number, since it is larger than the sum of its proper divisors (1).

102102120121 is an equidigital number, since it uses as much as digits as its factorization.

102102120121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 102102120121 its reverse (121021201201), we get a palindrome (223123321322).

The spelling of 102102120121 in words is "one hundred two billion, one hundred two million, one hundred twenty thousand, one hundred twenty-one".