7205281121 has 2 divisors, whose sum is σ = 7205281122. Its totient is φ = 7205281120.

The previous prime is 7205281073. The next prime is 7205281129. The reversal of 7205281121 is 1211825027.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6058442896 + 1146838225 = 77836^2 + 33865^2 .

It is a cyclic number.

It is not a de Polignac number, because 7205281121 - 2¹⁰ = 7205280097 is a prime.

It is not a weakly prime, because it can be changed into another prime (7205281129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3602640560 + 3602640561.

It is an arithmetic number, because the mean of its divisors is an integer number (3602640561).

Almost surely, 2^7205281121 is an apocalyptic number.

It is an amenable number.

7205281121 is a deficient number, since it is larger than the sum of its proper divisors (1).

7205281121 is an equidigital number, since it uses as much as digits as its factorization.

7205281121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2240, while the sum is 29.

The square root of 7205281121 is about 84883.9273419886. The cubic root of 7205281121 is about 1931.4507710740.

The spelling of 7205281121 in words is "seven billion, two hundred five million, two hundred eighty-one thousand, one hundred twenty-one".