22121661241 has 2 divisors, whose sum is σ = 22121661242. Its totient is φ = 22121661240.

The previous prime is 22121661229. The next prime is 22121661307. The reversal of 22121661241 is 14216612122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21426811641 + 694849600 = 146379^2 + 26360^2 .

It is a cyclic number.

It is not a de Polignac number, because 22121661241 - 2⁵ = 22121661209 is a prime.

It is not a weakly prime, because it can be changed into another prime (22121661641) 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 as a sum of consecutive naturals, namely, 11060830620 + 11060830621.

It is an arithmetic number, because the mean of its divisors is an integer number (11060830621).

Almost surely, 2^22121661241 is an apocalyptic number.

It is an amenable number.

22121661241 is a deficient number, since it is larger than the sum of its proper divisors (1).

22121661241 is an equidigital number, since it uses as much as digits as its factorization.

22121661241 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2304, while the sum is 28.

The spelling of 22121661241 in words is "twenty-two billion, one hundred twenty-one million, six hundred sixty-one thousand, two hundred forty-one".