20222405521 has 2 divisors, whose sum is σ = 20222405522. Its totient is φ = 20222405520.

The previous prime is 20222405519. The next prime is 20222405551. The reversal of 20222405521 is 12550422202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18534099600 + 1688305921 = 136140^2 + 41089^2 .

It is a cyclic number.

It is not a de Polignac number, because 20222405521 - 2¹ = 20222405519 is a prime.

Together with 20222405519, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (20222405501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10111202760 + 10111202761.

It is an arithmetic number, because the mean of its divisors is an integer number (10111202761).

Almost surely, 2^20222405521 is an apocalyptic number.

It is an amenable number.

20222405521 is a deficient number, since it is larger than the sum of its proper divisors (1).

20222405521 is an equidigital number, since it uses as much as digits as its factorization.

20222405521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3200, while the sum is 25.

Adding to 20222405521 its reverse (12550422202), we get a palindrome (32772827723).

The spelling of 20222405521 in words is "twenty billion, two hundred twenty-two million, four hundred five thousand, five hundred twenty-one".