2222121221987 has 2 divisors, whose sum is σ = 2222121221988. Its totient is φ = 2222121221986.

The previous prime is 2222121221953. The next prime is 2222121222023. The reversal of 2222121221987 is 7891221212222.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2222121221987 - 2⁶ = 2222121221923 is a prime.

It is not a weakly prime, because it can be changed into another prime (2222121221927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1111060610993 + 1111060610994.

It is an arithmetic number, because the mean of its divisors is an integer number (1111060610994).

Almost surely, 2^{2222121221987} is an apocalyptic number.

2222121221987 is a deficient number, since it is larger than the sum of its proper divisors (1).

2222121221987 is an equidigital number, since it uses as much as digits as its factorization.

2222121221987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64512, while the sum is 41.

The spelling of 2222121221987 in words is "two trillion, two hundred twenty-two billion, one hundred twenty-one million, two hundred twenty-one thousand, nine hundred eighty-seven".