1105881047981 has 2 divisors, whose sum is σ = 1105881047982. Its totient is φ = 1105881047980.

The previous prime is 1105881047969. The next prime is 1105881048023. The reversal of 1105881047981 is 1897401885011.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1017929655625 + 87951392356 = 1008925^2 + 296566^2 .

It is a cyclic number.

It is not a de Polignac number, because 1105881047981 - 2⁶ = 1105881047917 is a prime.

It is a super-2 number, since 2×1105881047981² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1105881047951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 552940523990 + 552940523991.

It is an arithmetic number, because the mean of its divisors is an integer number (552940523991).

Almost surely, 2^{1105881047981} is an apocalyptic number.

It is an amenable number.

1105881047981 is a deficient number, since it is larger than the sum of its proper divisors (1).

1105881047981 is an equidigital number, since it uses as much as digits as its factorization.

1105881047981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 645120, while the sum is 53.

The spelling of 1105881047981 in words is "one trillion, one hundred five billion, eight hundred eighty-one million, forty-seven thousand, nine hundred eighty-one".