11211001121987 has 2 divisors, whose sum is σ = 11211001121988. Its totient is φ = 11211001121986.

The previous prime is 11211001121941. The next prime is 11211001122019. The reversal of 11211001121987 is 78912110011211.

It is a strong prime.

It is an emirp because it is prime and its reverse (78912110011211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11211001121987 - 2²⁰ = 11211000073411 is a prime.

It is not a weakly prime, because it can be changed into another prime (11211001121687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5605500560993 + 5605500560994.

It is an arithmetic number, because the mean of its divisors is an integer number (5605500560994).

Almost surely, 2^{11211001121987} is an apocalyptic number.

11211001121987 is a deficient number, since it is larger than the sum of its proper divisors (1).

11211001121987 is an equidigital number, since it uses as much as digits as its factorization.

11211001121987 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 35.

The spelling of 11211001121987 in words is "eleven trillion, two hundred eleven billion, one million, one hundred twenty-one thousand, nine hundred eighty-seven".