254421113043221 has 2 divisors, whose sum is σ = 254421113043222. Its totient is φ = 254421113043220.

The previous prime is 254421113043197. The next prime is 254421113043277. The reversal of 254421113043221 is 122340311124452.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 248684541970225 + 5736571072996 = 15769735^2 + 2395114^2 .

It is a cyclic number.

It is not a de Polignac number, because 254421113043221 - 2¹⁴ = 254421113026837 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (254421113043521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127210556521610 + 127210556521611.

It is an arithmetic number, because the mean of its divisors is an integer number (127210556521611).

Almost surely, 2^{254421113043221} is an apocalyptic number.

It is an amenable number.

254421113043221 is a deficient number, since it is larger than the sum of its proper divisors (1).

254421113043221 is an equidigital number, since it uses as much as digits as its factorization.

254421113043221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46080, while the sum is 35.

Adding to 254421113043221 its reverse (122340311124452), we get a palindrome (376761424167673).

The spelling of 254421113043221 in words is "two hundred fifty-four trillion, four hundred twenty-one billion, one hundred thirteen million, forty-three thousand, two hundred twenty-one".