221111220001201 has 2 divisors, whose sum is σ = 221111220001202. Its totient is φ = 221111220001200.

The previous prime is 221111220001169. The next prime is 221111220001219. The reversal of 221111220001201 is 102100022111122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 179808682844176 + 41302537157025 = 13409276^2 + 6426705^2 .

It is a cyclic number.

It is not a de Polignac number, because 221111220001201 - 2⁵ = 221111220001169 is a prime.

It is a super-2 number, since 2×221111220001201² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (221111220301201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110555610000600 + 110555610000601.

It is an arithmetic number, because the mean of its divisors is an integer number (110555610000601).

Almost surely, 2^{221111220001201} is an apocalyptic number.

It is an amenable number.

221111220001201 is a deficient number, since it is larger than the sum of its proper divisors (1).

221111220001201 is an equidigital number, since it uses as much as digits as its factorization.

221111220001201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 221111220001201 its reverse (102100022111122), we get a palindrome (323211242112323).

The spelling of 221111220001201 in words is "two hundred twenty-one trillion, one hundred eleven billion, two hundred twenty million, one thousand, two hundred one".