20221321123 has 2 divisors, whose sum is σ = 20221321124. Its totient is φ = 20221321122.

The previous prime is 20221321117. The next prime is 20221321129. The reversal of 20221321123 is 32112312202.

It is a balanced prime because it is at equal distance from previous prime (20221321117) and next prime (20221321129).

It is a cyclic number.

It is not a de Polignac number, because 20221321123 - 2¹⁷ = 20221190051 is a prime.

It is a super-2 number, since 2×20221321123² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20221321123.

It is not a weakly prime, because it can be changed into another prime (20221321129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10110660561 + 10110660562.

It is an arithmetic number, because the mean of its divisors is an integer number (10110660562).

Almost surely, 2^20221321123 is an apocalyptic number.

20221321123 is a deficient number, since it is larger than the sum of its proper divisors (1).

20221321123 is an equidigital number, since it uses as much as digits as its factorization.

20221321123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 20221321123 its reverse (32112312202), we get a palindrome (52333633325).

The spelling of 20221321123 in words is "twenty billion, two hundred twenty-one million, three hundred twenty-one thousand, one hundred twenty-three".