22121224061 has 2 divisors, whose sum is σ = 22121224062. Its totient is φ = 22121224060.

The previous prime is 22121224019. The next prime is 22121224133. The reversal of 22121224061 is 16042212122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17552275225 + 4568948836 = 132485^2 + 67594^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22121224061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22121224261) 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, 11060612030 + 11060612031.

It is an arithmetic number, because the mean of its divisors is an integer number (11060612031).

Almost surely, 2^22121224061 is an apocalyptic number.

It is an amenable number.

22121224061 is a deficient number, since it is larger than the sum of its proper divisors (1).

22121224061 is an equidigital number, since it uses as much as digits as its factorization.

22121224061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 22121224061 its reverse (16042212122), we get a palindrome (38163436183).

The spelling of 22121224061 in words is "twenty-two billion, one hundred twenty-one million, two hundred twenty-four thousand, sixty-one".