10201020121987 has 2 divisors, whose sum is σ = 10201020121988. Its totient is φ = 10201020121986.

The previous prime is 10201020121951. The next prime is 10201020122003. The reversal of 10201020121987 is 78912102010201.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 10201020121987 - 2¹⁵ = 10201020089219 is a prime.

It is not a weakly prime, because it can be changed into another prime (10201020121387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5100510060993 + 5100510060994.

It is an arithmetic number, because the mean of its divisors is an integer number (5100510060994).

Almost surely, 2^{10201020121987} is an apocalyptic number.

10201020121987 is a deficient number, since it is larger than the sum of its proper divisors (1).

10201020121987 is an equidigital number, since it uses as much as digits as its factorization.

10201020121987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 34.

The spelling of 10201020121987 in words is "ten trillion, two hundred one billion, twenty million, one hundred twenty-one thousand, nine hundred eighty-seven".