201221330031 has 24 divisors (see below), whose sum is σ = 301474111120. Its totient is φ = 134122563072.

The previous prime is 201221330029. The next prime is 201221330039. The reversal of 201221330031 is 130033122102.

It is not a de Polignac number, because 201221330031 - 2¹ = 201221330029 is a prime.

It is a super-2 number, since 2×201221330031² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201221329986 and 201221330013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201221330039) 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, 1278921 + ... + 1427613.

Almost surely, 2^201221330031 is an apocalyptic number.

201221330031 is a deficient number, since it is larger than the sum of its proper divisors (100252781089).

201221330031 is an equidigital number, since it uses as much as digits as its factorization.

201221330031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154277 (or 154265 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 201221330031 its reverse (130033122102), we get a palindrome (331254452133).

The spelling of 201221330031 in words is "two hundred one billion, two hundred twenty-one million, three hundred thirty thousand, thirty-one".