20301231221 has 8 divisors (see below), whose sum is σ = 21700574784. Its totient is φ = 18944944480.

The previous prime is 20301231193. The next prime is 20301231239. The reversal of 20301231221 is 12213210302.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20301231221 - 2⁶ = 20301231157 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20301231221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20301234221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10763231 + ... + 10765116.

It is an arithmetic number, because the mean of its divisors is an integer number (2712571848).

Almost surely, 2^20301231221 is an apocalyptic number.

It is an amenable number.

20301231221 is a deficient number, since it is larger than the sum of its proper divisors (1399343563).

20301231221 is a wasteful number, since it uses less digits than its factorization.

20301231221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21528411.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 20301231221 its reverse (12213210302), we get a palindrome (32514441523).

The spelling of 20301231221 in words is "twenty billion, three hundred one million, two hundred thirty-one thousand, two hundred twenty-one".