221200002097 has 2 divisors, whose sum is σ = 221200002098. Its totient is φ = 221200002096.

The previous prime is 221200002083. The next prime is 221200002103. The reversal of 221200002097 is 790200002122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 171078195456 + 50121806641 = 413616^2 + 223879^2 .

It is a cyclic number.

It is not a de Polignac number, because 221200002097 - 2⁷ = 221200001969 is a prime.

It is not a weakly prime, because it can be changed into another prime (221200002007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110600001048 + 110600001049.

It is an arithmetic number, because the mean of its divisors is an integer number (110600001049).

Almost surely, 2^221200002097 is an apocalyptic number.

It is an amenable number.

221200002097 is a deficient number, since it is larger than the sum of its proper divisors (1).

221200002097 is an equidigital number, since it uses as much as digits as its factorization.

221200002097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 25.

Adding to 221200002097 its sum of digits (25), we get a palindrome (221200002122).

The spelling of 221200002097 in words is "two hundred twenty-one billion, two hundred million, two thousand, ninety-seven".