102502121 has 2 divisors, whose sum is σ = 102502122. Its totient is φ = 102502120.

The previous prime is 102502117. The next prime is 102502157. The reversal of 102502121 is 121205201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71588521 + 30913600 = 8461^2 + 5560^2 .

It is a cyclic number.

It is not a de Polignac number, because 102502121 - 2² = 102502117 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 102502096 and 102502105.

It is not a weakly prime, because it can be changed into another prime (102502111) 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, 51251060 + 51251061.

It is an arithmetic number, because the mean of its divisors is an integer number (51251061).

Almost surely, 2^102502121 is an apocalyptic number.

It is an amenable number.

102502121 is a deficient number, since it is larger than the sum of its proper divisors (1).

102502121 is an equidigital number, since it uses as much as digits as its factorization.

102502121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40, while the sum is 14.

The square root of 102502121 is about 10124.3331138401. Note that the first 3 decimals coincide. The cubic root of 102502121 is about 467.9983091594.

Adding to 102502121 its reverse (121205201), we get a palindrome (223707322).

The spelling of 102502121 in words is "one hundred two million, five hundred two thousand, one hundred twenty-one".