221002097 has 2 divisors, whose sum is σ = 221002098. Its totient is φ = 221002096.

The previous prime is 221002087. The next prime is 221002121. The reversal of 221002097 is 790200122.

221002097 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 123565456 + 97436641 = 11116^2 + 9871^2 .

It is a cyclic number.

It is not a de Polignac number, because 221002097 - 2⁴ = 221002081 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (221002087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110501048 + 110501049.

It is an arithmetic number, because the mean of its divisors is an integer number (110501049).

Almost surely, 2^221002097 is an apocalyptic number.

It is an amenable number.

221002097 is a deficient number, since it is larger than the sum of its proper divisors (1).

221002097 is an equidigital number, since it uses as much as digits as its factorization.

221002097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 221002097 is about 14866.1392768936. The cubic root of 221002097 is about 604.5962718642.

The spelling of 221002097 in words is "two hundred twenty-one million, two thousand, ninety-seven".