7200121 has 2 divisors, whose sum is σ = 7200122. Its totient is φ = 7200120.

The previous prime is 7200101. The next prime is 7200131. The reversal of 7200121 is 1210027.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3920400 + 3279721 = 1980^2 + 1811^2 .

It is a cyclic number.

It is not a de Polignac number, because 7200121 - 2⁹ = 7199609 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7200101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3600060 + 3600061.

It is an arithmetic number, because the mean of its divisors is an integer number (3600061).

Almost surely, 2^7200121 is an apocalyptic number.

It is an amenable number.

7200121 is a deficient number, since it is larger than the sum of its proper divisors (1).

7200121 is an equidigital number, since it uses as much as digits as its factorization.

7200121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28, while the sum is 13.

The square root of 7200121 is about 2683.3041199238. The cubic root of 7200121 is about 193.0989586208.

Adding to 7200121 its reverse (1210027), we get a palindrome (8410148).

The spelling of 7200121 in words is "seven million, two hundred thousand, one hundred twenty-one".