220001111987 has 2 divisors, whose sum is σ = 220001111988. Its totient is φ = 220001111986.

The previous prime is 220001111983. The next prime is 220001112041. The reversal of 220001111987 is 789111100022.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 220001111987 - 2² = 220001111983 is a prime.

It is not a weakly prime, because it can be changed into another prime (220001111983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110000555993 + 110000555994.

It is an arithmetic number, because the mean of its divisors is an integer number (110000555994).

Almost surely, 2^220001111987 is an apocalyptic number.

220001111987 is a deficient number, since it is larger than the sum of its proper divisors (1).

220001111987 is an equidigital number, since it uses as much as digits as its factorization.

220001111987 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 32.

The spelling of 220001111987 in words is "two hundred twenty billion, one million, one hundred eleven thousand, nine hundred eighty-seven".