201232311221 has 16 divisors (see below), whose sum is σ = 204127596288. Its totient is φ = 198356184000.

The previous prime is 201232311199. The next prime is 201232311223. The reversal of 201232311221 is 122113232102.

It is a cyclic number.

It is not a de Polignac number, because 201232311221 - 2³⁴ = 184052442037 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 201232311193 and 201232311202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201232311223) 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, 34650500 + ... + 34656306.

It is an arithmetic number, because the mean of its divisors is an integer number (12757974768).

Almost surely, 2^201232311221 is an apocalyptic number.

It is an amenable number.

201232311221 is a deficient number, since it is larger than the sum of its proper divisors (2895285067).

201232311221 is a wasteful number, since it uses less digits than its factorization.

201232311221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7372.

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

Adding to 201232311221 its reverse (122113232102), we get a palindrome (323345543323).

The spelling of 201232311221 in words is "two hundred one billion, two hundred thirty-two million, three hundred eleven thousand, two hundred twenty-one".