20222431321 has 4 divisors (see below), whose sum is σ = 20223199972. Its totient is φ = 20221662672.

The previous prime is 20222431309. The next prime is 20222431349. The reversal of 20222431321 is 12313422202.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12313422202 = 2 ⋅6156711101.

It can be written as a sum of positive squares in 2 ways, for example, as 10129416025 + 10093015296 = 100645^2 + 100464^2 .

It is a cyclic number.

It is not a de Polignac number, because 20222431321 - 2¹³ = 20222423129 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20222431292 and 20222431301.

It is not an unprimeable number, because it can be changed into a prime (20222431421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 343410 + ... + 397963.

It is an arithmetic number, because the mean of its divisors is an integer number (5055799993).

Almost surely, 2^20222431321 is an apocalyptic number.

It is an amenable number.

20222431321 is a deficient number, since it is larger than the sum of its proper divisors (768651).

20222431321 is an equidigital number, since it uses as much as digits as its factorization.

20222431321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 768650.

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 20222431321 its reverse (12313422202), we get a palindrome (32535853523).

The spelling of 20222431321 in words is "twenty billion, two hundred twenty-two million, four hundred thirty-one thousand, three hundred twenty-one".