221011202111081 has 2 divisors, whose sum is σ = 221011202111082. Its totient is φ = 221011202111080.

The previous prime is 221011202111039. The next prime is 221011202111093. The reversal of 221011202111081 is 180111202110122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 159798041265625 + 61213160845456 = 12641125^2 + 7823884^2 .

It is a cyclic number.

It is not a de Polignac number, because 221011202111081 - 2²² = 221011197916777 is a prime.

It is a super-3 number, since 3×221011202111081³ (a number of 44 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (221011202131081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110505601055540 + 110505601055541.

It is an arithmetic number, because the mean of its divisors is an integer number (110505601055541).

Almost surely, 2^{221011202111081} is an apocalyptic number.

It is an amenable number.

221011202111081 is a deficient number, since it is larger than the sum of its proper divisors (1).

221011202111081 is an equidigital number, since it uses as much as digits as its factorization.

221011202111081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128, while the sum is 23.

The spelling of 221011202111081 in words is "two hundred twenty-one trillion, eleven billion, two hundred two million, one hundred eleven thousand, eighty-one".