2212211021987 has 2 divisors, whose sum is σ = 2212211021988. Its totient is φ = 2212211021986.

The previous prime is 2212211021963. The next prime is 2212211022041. The reversal of 2212211021987 is 7891201122122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2212211021987 - 2¹⁰ = 2212211020963 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2212211021987.

It is not a weakly prime, because it can be changed into another prime (2212211021927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1106105510993 + 1106105510994.

It is an arithmetic number, because the mean of its divisors is an integer number (1106105510994).

Almost surely, 2^{2212211021987} is an apocalyptic number.

2212211021987 is a deficient number, since it is larger than the sum of its proper divisors (1).

2212211021987 is an equidigital number, since it uses as much as digits as its factorization.

2212211021987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16128, while the sum is 38.

The spelling of 2212211021987 in words is "two trillion, two hundred twelve billion, two hundred eleven million, twenty-one thousand, nine hundred eighty-seven".