201221310433 has 16 divisors (see below), whose sum is σ = 244551585600. Its totient is φ = 163034383680.

The previous prime is 201221310401. The next prime is 201221310439. The reversal of 201221310433 is 334013122102.

It is a cyclic number.

It is not a de Polignac number, because 201221310433 - 2⁵ = 201221310401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201221310439) 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, 24256923 + ... + 24265216.

It is an arithmetic number, because the mean of its divisors is an integer number (15284474100).

Almost surely, 2^201221310433 is an apocalyptic number.

It is an amenable number.

201221310433 is a deficient number, since it is larger than the sum of its proper divisors (43330275167).

201221310433 is a wasteful number, since it uses less digits than its factorization.

201221310433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48522192.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 201221310433 its reverse (334013122102), we get a palindrome (535234432535).

The spelling of 201221310433 in words is "two hundred one billion, two hundred twenty-one million, three hundred ten thousand, four hundred thirty-three".