221201121221233 has 2 divisors, whose sum is σ = 221201121221234. Its totient is φ = 221201121221232.

The previous prime is 221201121221177. The next prime is 221201121221317. The reversal of 221201121221233 is 332122121102122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 141674552954944 + 79526568266289 = 11902712^2 + 8917767^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221201121221233 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221201121221198 and 221201121221207.

It is not a weakly prime, because it can be changed into another prime (221201121221833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110600560610616 + 110600560610617.

It is an arithmetic number, because the mean of its divisors is an integer number (110600560610617).

Almost surely, 2^{221201121221233} is an apocalyptic number.

It is an amenable number.

221201121221233 is a deficient number, since it is larger than the sum of its proper divisors (1).

221201121221233 is an equidigital number, since it uses as much as digits as its factorization.

221201121221233 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 25.

Adding to 221201121221233 its reverse (332122121102122), we get a palindrome (553323242323355).

The spelling of 221201121221233 in words is "two hundred twenty-one trillion, two hundred one billion, one hundred twenty-one million, two hundred twenty-one thousand, two hundred thirty-three".