20302221231 has 12 divisors (see below), whose sum is σ = 29326875240. Its totient is φ = 13534147440.

The previous prime is 20302221217. The next prime is 20302221241. The reversal of 20302221231 is 13212220302.

It is not a de Polignac number, because 20302221231 - 2⁷ = 20302221103 is a prime.

It is a super-2 number, since 2×20302221231² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20302221211) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 198385 + ... + 282773.

It is an arithmetic number, because the mean of its divisors is an integer number (2443906270).

Almost surely, 2^20302221231 is an apocalyptic number.

20302221231 is a deficient number, since it is larger than the sum of its proper divisors (9024654009).

20302221231 is a wasteful number, since it uses less digits than its factorization.

20302221231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111126 (or 111123 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 20302221231 its reverse (13212220302), we get a palindrome (33514441533).

The spelling of 20302221231 in words is "twenty billion, three hundred two million, two hundred twenty-one thousand, two hundred thirty-one".