201221012147 has 2 divisors, whose sum is σ = 201221012148. Its totient is φ = 201221012146.

The previous prime is 201221012141. The next prime is 201221012171. The reversal of 201221012147 is 741210122102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 201221012147 - 2²² = 201216817843 is a prime.

It is not a weakly prime, because it can be changed into another prime (201221012141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100610506073 + 100610506074.

It is an arithmetic number, because the mean of its divisors is an integer number (100610506074).

Almost surely, 2^201221012147 is an apocalyptic number.

201221012147 is a deficient number, since it is larger than the sum of its proper divisors (1).

201221012147 is an equidigital number, since it uses as much as digits as its factorization.

201221012147 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 448, while the sum is 23.

Adding to 201221012147 its reverse (741210122102), we get a palindrome (942431134249).

The spelling of 201221012147 in words is "two hundred one billion, two hundred twenty-one million, twelve thousand, one hundred forty-seven".