111220020119981 has 2 divisors, whose sum is σ = 111220020119982. Its totient is φ = 111220020119980.

The previous prime is 111220020119881. The next prime is 111220020120037. The reversal of 111220020119981 is 189911020022111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 89986263959881 + 21233756160100 = 9486109^2 + 4608010^2 .

It is a cyclic number.

It is not a de Polignac number, because 111220020119981 - 2¹⁰ = 111220020118957 is a prime.

It is a super-2 number, since 2×111220020119981² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111220020119881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55610010059990 + 55610010059991.

It is an arithmetic number, because the mean of its divisors is an integer number (55610010059991).

Almost surely, 2^{111220020119981} is an apocalyptic number.

It is an amenable number.

111220020119981 is a deficient number, since it is larger than the sum of its proper divisors (1).

111220020119981 is an equidigital number, since it uses as much as digits as its factorization.

111220020119981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 38.

The spelling of 111220020119981 in words is "one hundred eleven trillion, two hundred twenty billion, twenty million, one hundred nineteen thousand, nine hundred eighty-one".