8121403001 has 2 divisors, whose sum is σ = 8121403002. Its totient is φ = 8121403000.

The previous prime is 8121402983. The next prime is 8121403021. The reversal of 8121403001 is 1003041218.

It is an a-pointer prime, because the next prime (8121403021) can be obtained adding 8121403001 to its sum of digits (20).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6936391225 + 1185011776 = 83285^2 + 34424^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8121403001 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (8121403021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4060701500 + 4060701501.

It is an arithmetic number, because the mean of its divisors is an integer number (4060701501).

Almost surely, 2^8121403001 is an apocalyptic number.

It is an amenable number.

8121403001 is a deficient number, since it is larger than the sum of its proper divisors (1).

8121403001 is an equidigital number, since it uses as much as digits as its factorization.

8121403001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 8121403001 is about 90118.8271173122. The cubic root of 8121403001 is about 2010.0661678836.

Adding to 8121403001 its reverse (1003041218), we get a palindrome (9124444219).

The spelling of 8121403001 in words is "eight billion, one hundred twenty-one million, four hundred three thousand, one".