111043403012981 has 2 divisors, whose sum is σ = 111043403012982. Its totient is φ = 111043403012980.

The previous prime is 111043403012917. The next prime is 111043403013077. The reversal of 111043403012981 is 189210304340111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 110979272008900 + 64131004081 = 10534670^2 + 253241^2 .

It is an emirp because it is prime and its reverse (189210304340111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111043403012981 - 2⁶ = 111043403012917 is a prime.

It is a super-2 number, since 2×111043403012981² (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 (111043403014981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55521701506490 + 55521701506491.

It is an arithmetic number, because the mean of its divisors is an integer number (55521701506491).

Almost surely, 2^{111043403012981} is an apocalyptic number.

It is an amenable number.

111043403012981 is a deficient number, since it is larger than the sum of its proper divisors (1).

111043403012981 is an equidigital number, since it uses as much as digits as its factorization.

111043403012981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 38.

The spelling of 111043403012981 in words is "one hundred eleven trillion, forty-three billion, four hundred three million, twelve thousand, nine hundred eighty-one".