1111112110981 has 2 divisors, whose sum is σ = 1111112110982. Its totient is φ = 1111112110980.

The previous prime is 1111112110973. The next prime is 1111112111003. The reversal of 1111112110981 is 1890112111111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1074923136225 + 36188974756 = 1036785^2 + 190234^2 .

It is a cyclic number.

It is not a de Polignac number, because 1111112110981 - 2³ = 1111112110973 is a prime.

It is a super-2 number, since 2×1111112110981² (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 (1111112110931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555556055490 + 555556055491.

It is an arithmetic number, because the mean of its divisors is an integer number (555556055491).

Almost surely, 2^{1111112110981} is an apocalyptic number.

It is an amenable number.

1111112110981 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111112110981 is an equidigital number, since it uses as much as digits as its factorization.

1111112110981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 28.

The spelling of 1111112110981 in words is "one trillion, one hundred eleven billion, one hundred twelve million, one hundred ten thousand, nine hundred eighty-one".