201221000002403 has 2 divisors, whose sum is σ = 201221000002404. Its totient is φ = 201221000002402.

The previous prime is 201221000002369. The next prime is 201221000002423. The reversal of 201221000002403 is 304200000122102.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201221000002403 is a prime.

It is not a weakly prime, because it can be changed into another prime (201221000002423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100610500001201 + 100610500001202.

It is an arithmetic number, because the mean of its divisors is an integer number (100610500001202).

Almost surely, 2^{201221000002403} is an apocalyptic number.

201221000002403 is a deficient number, since it is larger than the sum of its proper divisors (1).

201221000002403 is an equidigital number, since it uses as much as digits as its factorization.

201221000002403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 201221000002403 its reverse (304200000122102), we get a palindrome (505421000124505).

The spelling of 201221000002403 in words is "two hundred one trillion, two hundred twenty-one billion, two thousand, four hundred three".