111002220101081 has 2 divisors, whose sum is σ = 111002220101082. Its totient is φ = 111002220101080.

The previous prime is 111002220101033. The next prime is 111002220101099. The reversal of 111002220101081 is 180101022200111.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 84921588214681 + 26080631886400 = 9215291^2 + 5106920^2 .

It is an emirp because it is prime and its reverse (180101022200111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111002220101081 - 2¹⁴ = 111002220084697 is a prime.

It is a super-2 number, since 2×111002220101081² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (111002220101281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55501110050540 + 55501110050541.

It is an arithmetic number, because the mean of its divisors is an integer number (55501110050541).

Almost surely, 2^{111002220101081} is an apocalyptic number.

It is an amenable number.

111002220101081 is a deficient number, since it is larger than the sum of its proper divisors (1).

111002220101081 is an equidigital number, since it uses as much as digits as its factorization.

111002220101081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 20.

Adding to 111002220101081 its reverse (180101022200111), we get a palindrome (291103242301192).

The spelling of 111002220101081 in words is "one hundred eleven trillion, two billion, two hundred twenty million, one hundred one thousand, eighty-one".