2111013221987 has 2 divisors, whose sum is σ = 2111013221988. Its totient is φ = 2111013221986.

The previous prime is 2111013221981. The next prime is 2111013222011. The reversal of 2111013221987 is 7891223101112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2111013221987 - 2⁴ = 2111013221971 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2111013221987.

It is not a weakly prime, because it can be changed into another prime (2111013221981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1055506610993 + 1055506610994.

It is an arithmetic number, because the mean of its divisors is an integer number (1055506610994).

Almost surely, 2^{2111013221987} is an apocalyptic number.

2111013221987 is a deficient number, since it is larger than the sum of its proper divisors (1).

2111013221987 is an equidigital number, since it uses as much as digits as its factorization.

2111013221987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 38.

The spelling of 2111013221987 in words is "two trillion, one hundred eleven billion, thirteen million, two hundred twenty-one thousand, nine hundred eighty-seven".