7247208121 has 2 divisors, whose sum is σ = 7247208122. Its totient is φ = 7247208120.

The previous prime is 7247208107. The next prime is 7247208131. The reversal of 7247208121 is 1218027427.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7151070096 + 96138025 = 84564^2 + 9805^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7247208121 is a prime.

It is not a weakly prime, because it can be changed into another prime (7247208131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3623604060 + 3623604061.

It is an arithmetic number, because the mean of its divisors is an integer number (3623604061).

Almost surely, 2^7247208121 is an apocalyptic number.

It is an amenable number.

7247208121 is a deficient number, since it is larger than the sum of its proper divisors (1).

7247208121 is an equidigital number, since it uses as much as digits as its factorization.

7247208121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12544, while the sum is 34.

The square root of 7247208121 is about 85130.5357730116. The cubic root of 7247208121 is about 1935.1898511940.

The spelling of 7247208121 in words is "seven billion, two hundred forty-seven million, two hundred eight thousand, one hundred twenty-one".