221221010203 has 2 divisors, whose sum is σ = 221221010204. Its totient is φ = 221221010202.

The previous prime is 221221010123. The next prime is 221221010299. The reversal of 221221010203 is 302010122122.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221221010203 - 2¹³ = 221221002011 is a prime.

It is not a weakly prime, because it can be changed into another prime (221221110203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110610505101 + 110610505102.

It is an arithmetic number, because the mean of its divisors is an integer number (110610505102).

Almost surely, 2^221221010203 is an apocalyptic number.

221221010203 is a deficient number, since it is larger than the sum of its proper divisors (1).

221221010203 is an equidigital number, since it uses as much as digits as its factorization.

221221010203 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 221221010203 its reverse (302010122122), we get a palindrome (523231132325).

The spelling of 221221010203 in words is "two hundred twenty-one billion, two hundred twenty-one million, ten thousand, two hundred three".