220120002001987 has 2 divisors, whose sum is σ = 220120002001988. Its totient is φ = 220120002001986.

The previous prime is 220120002001969. The next prime is 220120002002039. The reversal of 220120002001987 is 789100200021022.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 220120002001987 - 2⁷ = 220120002001859 is a prime.

It is not a weakly prime, because it can be changed into another prime (220120002001687) 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, 110060001000993 + 110060001000994.

It is an arithmetic number, because the mean of its divisors is an integer number (110060001000994).

Almost surely, 2^{220120002001987} is an apocalyptic number.

220120002001987 is a deficient number, since it is larger than the sum of its proper divisors (1).

220120002001987 is an equidigital number, since it uses as much as digits as its factorization.

220120002001987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8064, while the sum is 34.

The spelling of 220120002001987 in words is "two hundred twenty trillion, one hundred twenty billion, two million, one thousand, nine hundred eighty-seven".