103200121 has 2 divisors, whose sum is σ = 103200122. Its totient is φ = 103200120.

The previous prime is 103200113. The next prime is 103200137. The reversal of 103200121 is 121002301.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64000000 + 39200121 = 8000^2 + 6261^2 .

It is a cyclic number.

It is not a de Polignac number, because 103200121 - 2³ = 103200113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 103200098 and 103200107.

It is not a weakly prime, because it can be changed into another prime (103200101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51600060 + 51600061.

It is an arithmetic number, because the mean of its divisors is an integer number (51600061).

Almost surely, 2^103200121 is an apocalyptic number.

It is an amenable number.

103200121 is a deficient number, since it is larger than the sum of its proper divisors (1).

103200121 is an equidigital number, since it uses as much as digits as its factorization.

103200121 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 10.

The square root of 103200121 is about 10158.7460348214. The cubic root of 103200121 is about 469.0582030958.

Adding to 103200121 its reverse (121002301), we get a palindrome (224202422).

The spelling of 103200121 in words is "one hundred three million, two hundred thousand, one hundred twenty-one".