103207121 has 2 divisors, whose sum is σ = 103207122. Its totient is φ = 103207120.

The previous prime is 103207103. The next prime is 103207123. The reversal of 103207121 is 121702301.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 83978896 + 19228225 = 9164^2 + 4385^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-103207121 is a prime.

Together with 103207123, 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 103207121.

It is not a weakly prime, because it can be changed into another prime (103207123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51603560 + 51603561.

It is an arithmetic number, because the mean of its divisors is an integer number (51603561).

Almost surely, 2^103207121 is an apocalyptic number.

It is an amenable number.

103207121 is a deficient number, since it is larger than the sum of its proper divisors (1).

103207121 is an equidigital number, since it uses as much as digits as its factorization.

103207121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 84, while the sum is 17.

The square root of 103207121 is about 10159.0905596909. The cubic root of 103207121 is about 469.0688081647.

Adding to 103207121 its reverse (121702301), we get a palindrome (224909422).

The spelling of 103207121 in words is "one hundred three million, two hundred seven thousand, one hundred twenty-one".