102103121 has 2 divisors, whose sum is σ = 102103122. Its totient is φ = 102103120.

The previous prime is 102103117. The next prime is 102103147. The reversal of 102103121 is 121301201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 101284096 + 819025 = 10064^2 + 905^2 .

It is a cyclic number.

It is not a de Polignac number, because 102103121 - 2² = 102103117 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (102103151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51051560 + 51051561.

It is an arithmetic number, because the mean of its divisors is an integer number (51051561).

Almost surely, 2^102103121 is an apocalyptic number.

It is an amenable number.

102103121 is a deficient number, since it is larger than the sum of its proper divisors (1).

102103121 is an equidigital number, since it uses as much as digits as its factorization.

102103121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 102103121 is about 10104.6088989134. The cubic root of 102103121 is about 467.3902757544.

Adding to 102103121 its reverse (121301201), we get a palindrome (223404322).

It can be divided in two parts, 10210 and 3121, that added together give a palindrome (13331).

The spelling of 102103121 in words is "one hundred two million, one hundred three thousand, one hundred twenty-one".