22240124151221 has 2 divisors, whose sum is σ = 22240124151222. Its totient is φ = 22240124151220.

The previous prime is 22240124151173. The next prime is 22240124151239. The reversal of 22240124151221 is 12215142104222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16691677947025 + 5548446204196 = 4085545^2 + 2355514^2 .

It is a cyclic number.

It is not a de Polignac number, because 22240124151221 - 2¹⁸ = 22240123889077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22240124151281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11120062075610 + 11120062075611.

It is an arithmetic number, because the mean of its divisors is an integer number (11120062075611).

Almost surely, 2^{22240124151221} is an apocalyptic number.

It is an amenable number.

22240124151221 is a deficient number, since it is larger than the sum of its proper divisors (1).

22240124151221 is an equidigital number, since it uses as much as digits as its factorization.

22240124151221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5120, while the sum is 29.

Adding to 22240124151221 its reverse (12215142104222), we get a palindrome (34455266255443).

The spelling of 22240124151221 in words is "twenty-two trillion, two hundred forty billion, one hundred twenty-four million, one hundred fifty-one thousand, two hundred twenty-one".