10211020111987 has 2 divisors, whose sum is σ = 10211020111988. Its totient is φ = 10211020111986.

The previous prime is 10211020111967. The next prime is 10211020112009. The reversal of 10211020111987 is 78911102011201.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 10211020111987 - 2¹⁵ = 10211020079219 is a prime.

It is not a weakly prime, because it can be changed into another prime (10211020111967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5105510055993 + 5105510055994.

It is an arithmetic number, because the mean of its divisors is an integer number (5105510055994).

Almost surely, 2^{10211020111987} is an apocalyptic number.

10211020111987 is a deficient number, since it is larger than the sum of its proper divisors (1).

10211020111987 is an equidigital number, since it uses as much as digits as its factorization.

10211020111987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 34.

The spelling of 10211020111987 in words is "ten trillion, two hundred eleven billion, twenty million, one hundred eleven thousand, nine hundred eighty-seven".