201012221987 has 2 divisors, whose sum is σ = 201012221988. Its totient is φ = 201012221986.

The previous prime is 201012221983. The next prime is 201012222007. The reversal of 201012221987 is 789122210102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 201012221987 - 2² = 201012221983 is a prime.

It is not a weakly prime, because it can be changed into another prime (201012221981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100506110993 + 100506110994.

It is an arithmetic number, because the mean of its divisors is an integer number (100506110994).

Almost surely, 2^201012221987 is an apocalyptic number.

201012221987 is a deficient number, since it is larger than the sum of its proper divisors (1).

201012221987 is an equidigital number, since it uses as much as digits as its factorization.

201012221987 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 35.

The spelling of 201012221987 in words is "two hundred one billion, twelve million, two hundred twenty-one thousand, nine hundred eighty-seven".