220212221987 has 2 divisors, whose sum is σ = 220212221988. Its totient is φ = 220212221986.

The previous prime is 220212221969. The next prime is 220212222011. The reversal of 220212221987 is 789122212022.

220212221987 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 220212221987 - 2⁸ = 220212221731 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 220212221987.

It is not a weakly prime, because it can be changed into another prime (220212229987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110106110993 + 110106110994.

It is an arithmetic number, because the mean of its divisors is an integer number (110106110994).

Almost surely, 2^220212221987 is an apocalyptic number.

220212221987 is a deficient number, since it is larger than the sum of its proper divisors (1).

220212221987 is an equidigital number, since it uses as much as digits as its factorization.

220212221987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32256, while the sum is 38.

The spelling of 220212221987 in words is "two hundred twenty billion, two hundred twelve million, two hundred twenty-one thousand, nine hundred eighty-seven".