1011184432981 has 2 divisors, whose sum is σ = 1011184432982. Its totient is φ = 1011184432980.

The previous prime is 1011184432969. The next prime is 1011184433047. The reversal of 1011184432981 is 1892344811101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 984839896881 + 26344536100 = 992391^2 + 162310^2 .

It is a cyclic number.

It is not a de Polignac number, because 1011184432981 - 2²¹ = 1011182335829 is a prime.

It is a super-2 number, since 2×1011184432981² (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 (1011184439981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505592216490 + 505592216491.

It is an arithmetic number, because the mean of its divisors is an integer number (505592216491).

Almost surely, 2^{1011184432981} is an apocalyptic number.

It is an amenable number.

1011184432981 is a deficient number, since it is larger than the sum of its proper divisors (1).

1011184432981 is an equidigital number, since it uses as much as digits as its factorization.

1011184432981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 55296, while the sum is 43.

The spelling of 1011184432981 in words is "one trillion, eleven billion, one hundred eighty-four million, four hundred thirty-two thousand, nine hundred eighty-one".