221230321201 has 2 divisors, whose sum is σ = 221230321202. Its totient is φ = 221230321200.

The previous prime is 221230321177. The next prime is 221230321211. The reversal of 221230321201 is 102123032122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 220734590976 + 495730225 = 469824^2 + 22265^2 .

It is a cyclic number.

It is not a de Polignac number, because 221230321201 - 2⁷ = 221230321073 is a prime.

It is not a weakly prime, because it can be changed into another prime (221230321211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110615160600 + 110615160601.

It is an arithmetic number, because the mean of its divisors is an integer number (110615160601).

Almost surely, 2^221230321201 is an apocalyptic number.

It is an amenable number.

221230321201 is a deficient number, since it is larger than the sum of its proper divisors (1).

221230321201 is an equidigital number, since it uses as much as digits as its factorization.

221230321201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 221230321201 its reverse (102123032122), we get a palindrome (323353353323).

The spelling of 221230321201 in words is "two hundred twenty-one billion, two hundred thirty million, three hundred twenty-one thousand, two hundred one".