201221121233 has 24 divisors (see below), whose sum is σ = 222388619040. Its totient is φ = 181927468800.

The previous prime is 201221121221. The next prime is 201221121247. The reversal of 201221121233 is 332121122102.

It is not a de Polignac number, because 201221121233 - 2²⁶ = 201154012369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201221121293) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 55630241 + ... + 55633857.

It is an arithmetic number, because the mean of its divisors is an integer number (9266192460).

Almost surely, 2^201221121233 is an apocalyptic number.

It is an amenable number.

201221121233 is a deficient number, since it is larger than the sum of its proper divisors (21167497807).

201221121233 is a wasteful number, since it uses less digits than its factorization.

201221121233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6029 (or 6018 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 201221121233 its reverse (332121122102), we get a palindrome (533342243335).

The spelling of 201221121233 in words is "two hundred one billion, two hundred twenty-one million, one hundred twenty-one thousand, two hundred thirty-three".