20202231321 has 6 divisors (see below), whose sum is σ = 29181000810. Its totient is φ = 13468154208.

The previous prime is 20202231317. The next prime is 20202231331. The reversal of 20202231321 is 12313220202.

It can be written as a sum of positive squares in only one way, i.e., 11752944921 + 8449286400 = 108411^2 + 91920^2 .

It is not a de Polignac number, because 20202231321 - 2² = 20202231317 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20202231294 and 20202231303.

It is not an unprimeable number, because it can be changed into a prime (20202231331) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1122346176 + ... + 1122346193.

It is an arithmetic number, because the mean of its divisors is an integer number (4863500135).

Almost surely, 2^20202231321 is an apocalyptic number.

It is an amenable number.

20202231321 is a deficient number, since it is larger than the sum of its proper divisors (8978769489).

20202231321 is a wasteful number, since it uses less digits than its factorization.

20202231321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2244692375 (or 2244692372 counting only the distinct ones).

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

Adding to 20202231321 its reverse (12313220202), we get a palindrome (32515451523).

The spelling of 20202231321 in words is "twenty billion, two hundred two million, two hundred thirty-one thousand, three hundred twenty-one".