201221000002103 has 2 divisors, whose sum is σ = 201221000002104. Its totient is φ = 201221000002102.

The previous prime is 201221000002091. The next prime is 201221000002117. The reversal of 201221000002103 is 301200000122102.

It is a happy number.

It is an a-pointer prime, because the next prime (201221000002117) can be obtained adding 201221000002103 to its sum of digits (14).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 201221000002103 - 2³⁶ = 201152280525367 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201221000002403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100610500001051 + 100610500001052.

It is an arithmetic number, because the mean of its divisors is an integer number (100610500001052).

Almost surely, 2^{201221000002103} is an apocalyptic number.

201221000002103 is a deficient number, since it is larger than the sum of its proper divisors (1).

201221000002103 is an equidigital number, since it uses as much as digits as its factorization.

201221000002103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 201221000002103 its reverse (301200000122102), we get a palindrome (502421000124205).

The spelling of 201221000002103 in words is "two hundred one trillion, two hundred twenty-one billion, two thousand, one hundred three".