221235097 has 2 divisors, whose sum is σ = 221235098. Its totient is φ = 221235096.

The previous prime is 221235061. The next prime is 221235103. The reversal of 221235097 is 790532122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 220700736 + 534361 = 14856^2 + 731^2 .

It is a cyclic number.

It is not a de Polignac number, because 221235097 - 2²³ = 212846489 is a prime.

It is not a weakly prime, because it can be changed into another prime (221235037) 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, 110617548 + 110617549.

It is an arithmetic number, because the mean of its divisors is an integer number (110617549).

Almost surely, 2^221235097 is an apocalyptic number.

It is an amenable number.

221235097 is a deficient number, since it is larger than the sum of its proper divisors (1).

221235097 is an equidigital number, since it uses as much as digits as its factorization.

221235097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 221235097 is about 14873.9738133426. The cubic root of 221235097 is about 604.8086702321.

The spelling of 221235097 in words is "two hundred twenty-one million, two hundred thirty-five thousand, ninety-seven".