220021120111081 has 2 divisors, whose sum is σ = 220021120111082. Its totient is φ = 220021120111080.

The previous prime is 220021120111033. The next prime is 220021120111103. The reversal of 220021120111081 is 180111021120022.

It is a happy number.

It is an a-pointer prime, because the next prime (220021120111103) can be obtained adding 220021120111081 to its sum of digits (22).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 194435136000000 + 25585984111081 = 13944000^2 + 5058259^2 .

It is a cyclic number.

It is not a de Polignac number, because 220021120111081 - 2⁹ = 220021120110569 is a prime.

It is a super-3 number, since 3×220021120111081³ (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 (220021120111981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110010560055540 + 110010560055541.

It is an arithmetic number, because the mean of its divisors is an integer number (110010560055541).

Almost surely, 2^{220021120111081} is an apocalyptic number.

It is an amenable number.

220021120111081 is a deficient number, since it is larger than the sum of its proper divisors (1).

220021120111081 is an equidigital number, since it uses as much as digits as its factorization.

220021120111081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 22.

The spelling of 220021120111081 in words is "two hundred twenty trillion, twenty-one billion, one hundred twenty million, one hundred eleven thousand, eighty-one".