102112121 has 2 divisors, whose sum is σ = 102112122. Its totient is φ = 102112120.

The previous prime is 102112063. The next prime is 102112139. The reversal of 102112121 is 121211201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 96255721 + 5856400 = 9811^2 + 2420^2 .

It is a cyclic number.

It is not a de Polignac number, because 102112121 - 2¹⁴ = 102095737 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (102112321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51056060 + 51056061.

It is an arithmetic number, because the mean of its divisors is an integer number (51056061).

Almost surely, 2^102112121 is an apocalyptic number.

It is an amenable number.

102112121 is a deficient number, since it is larger than the sum of its proper divisors (1).

102112121 is an equidigital number, since it uses as much as digits as its factorization.

102112121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 102112121 is about 10105.0542304334. The cubic root of 102112121 is about 467.4040082399.

Adding to 102112121 its reverse (121211201), we get a palindrome (223323322).

The spelling of 102112121 in words is "one hundred two million, one hundred twelve thousand, one hundred twenty-one".