101255221 has 2 divisors, whose sum is σ = 101255222. Its totient is φ = 101255220.

The previous prime is 101255197. The next prime is 101255243. The reversal of 101255221 is 122552101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 83064996 + 18190225 = 9114^2 + 4265^2 .

It is a cyclic number.

It is not a de Polignac number, because 101255221 - 2⁷ = 101255093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101255251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50627610 + 50627611.

It is an arithmetic number, because the mean of its divisors is an integer number (50627611).

Almost surely, 2^101255221 is an apocalyptic number.

It is an amenable number.

101255221 is a deficient number, since it is larger than the sum of its proper divisors (1).

101255221 is an equidigital number, since it uses as much as digits as its factorization.

101255221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 200, while the sum is 19.

The square root of 101255221 is about 10062.5653289805. The cubic root of 101255221 is about 466.0928870447.

The spelling of 101255221 in words is "one hundred one million, two hundred fifty-five thousand, two hundred twenty-one".