201020100019987 has 2 divisors, whose sum is σ = 201020100019988. Its totient is φ = 201020100019986.

The previous prime is 201020100019961. The next prime is 201020100020027. The reversal of 201020100019987 is 789910001020102.

It is an a-pointer prime, because the next prime (201020100020027) can be obtained adding 201020100019987 to its sum of digits (40).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 201020100019987 - 2¹⁵ = 201020099987219 is a prime.

It is a super-2 number, since 2×201020100019987² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (201020100019187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100510050009993 + 100510050009994.

It is an arithmetic number, because the mean of its divisors is an integer number (100510050009994).

Almost surely, 2^{201020100019987} is an apocalyptic number.

201020100019987 is a deficient number, since it is larger than the sum of its proper divisors (1).

201020100019987 is an equidigital number, since it uses as much as digits as its factorization.

201020100019987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 40.

The spelling of 201020100019987 in words is "two hundred one trillion, twenty billion, one hundred million, nineteen thousand, nine hundred eighty-seven".