254422031221 has 2 divisors, whose sum is σ = 254422031222. Its totient is φ = 254422031220.

The previous prime is 254422031209. The next prime is 254422031249. The reversal of 254422031221 is 122130224452.

It is an a-pointer prime, because the next prime (254422031249) can be obtained adding 254422031221 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 228064508721 + 26357522500 = 477561^2 + 162350^2 .

It is a cyclic number.

It is not a de Polignac number, because 254422031221 - 2³⁷ = 116983077749 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 254422031221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (254422031291) 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, 127211015610 + 127211015611.

It is an arithmetic number, because the mean of its divisors is an integer number (127211015611).

Almost surely, 2^254422031221 is an apocalyptic number.

It is an amenable number.

254422031221 is a deficient number, since it is larger than the sum of its proper divisors (1).

254422031221 is an equidigital number, since it uses as much as digits as its factorization.

254422031221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7680, while the sum is 28.

Adding to 254422031221 its reverse (122130224452), we get a palindrome (376552255673).

The spelling of 254422031221 in words is "two hundred fifty-four billion, four hundred twenty-two million, thirty-one thousand, two hundred twenty-one".