7530121801 has 2 divisors, whose sum is σ = 7530121802. Its totient is φ = 7530121800.

The previous prime is 7530121751. The next prime is 7530121813. The reversal of 7530121801 is 1081210357.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6981438025 + 548683776 = 83555^2 + 23424^2 .

It is an emirp because it is prime and its reverse (1081210357) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7530121801 - 2⁷ = 7530121673 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7530121801.

It is not a weakly prime, because it can be changed into another prime (7530121871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3765060900 + 3765060901.

It is an arithmetic number, because the mean of its divisors is an integer number (3765060901).

Almost surely, 2^7530121801 is an apocalyptic number.

It is an amenable number.

7530121801 is a deficient number, since it is larger than the sum of its proper divisors (1).

7530121801 is an equidigital number, since it uses as much as digits as its factorization.

7530121801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1680, while the sum is 28.

The square root of 7530121801 is about 86776.2744129984. The cubic root of 7530121801 is about 1960.0508282841.

The spelling of 7530121801 in words is "seven billion, five hundred thirty million, one hundred twenty-one thousand, eight hundred one".