10211020198987 has 2 divisors, whose sum is σ = 10211020198988. Its totient is φ = 10211020198986.

The previous prime is 10211020198957. The next prime is 10211020199033. The reversal of 10211020198987 is 78989102011201.

It is a weak prime.

It is an emirp because it is prime and its reverse (78989102011201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 10211020198987 - 2⁷ = 10211020198859 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 10211020198987.

It is not a weakly prime, because it can be changed into another prime (10211020198957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5105510099493 + 5105510099494.

It is an arithmetic number, because the mean of its divisors is an integer number (5105510099494).

Almost surely, 2^{10211020198987} is an apocalyptic number.

10211020198987 is a deficient number, since it is larger than the sum of its proper divisors (1).

10211020198987 is an equidigital number, since it uses as much as digits as its factorization.

10211020198987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145152, while the sum is 49.

The spelling of 10211020198987 in words is "ten trillion, two hundred eleven billion, twenty million, one hundred ninety-eight thousand, nine hundred eighty-seven".