201221220203 has 16 divisors (see below), whose sum is σ = 215305885440. Its totient is φ = 187498735200.

The previous prime is 201221220191. The next prime is 201221220253. The reversal of 201221220203 is 302022122102.

It is a cyclic number.

It is not a de Polignac number, because 201221220203 - 2⁶ = 201221220139 is a prime.

It is a super-2 number, since 2×201221220203² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201221220253) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 390776 + ... + 745082.

It is an arithmetic number, because the mean of its divisors is an integer number (13456617840).

Almost surely, 2^201221220203 is an apocalyptic number.

201221220203 is a deficient number, since it is larger than the sum of its proper divisors (14084665237).

201221220203 is a wasteful number, since it uses less digits than its factorization.

201221220203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 354818.

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

Adding to 201221220203 its reverse (302022122102), we get a palindrome (503243342305).

The spelling of 201221220203 in words is "two hundred one billion, two hundred twenty-one million, two hundred twenty thousand, two hundred three".