1100098981 has 2 divisors, whose sum is σ = 1100098982. Its totient is φ = 1100098980.

The previous prime is 1100098939. The next prime is 1100098999. The reversal of 1100098981 is 1898900011.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 985394881 + 114704100 = 31391^2 + 10710^2 .

It is a cyclic number.

It is not a de Polignac number, because 1100098981 - 2⁹ = 1100098469 is a prime.

It is a super-2 number, since 2×1100098981² = 2420435535994476722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1100098981.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1100098931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 550049490 + 550049491.

It is an arithmetic number, because the mean of its divisors is an integer number (550049491).

Almost surely, 2^1100098981 is an apocalyptic number.

It is an amenable number.

1100098981 is a deficient number, since it is larger than the sum of its proper divisors (1).

1100098981 is an equidigital number, since it uses as much as digits as its factorization.

1100098981 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 37.

The square root of 1100098981 is about 33167.7400647075. The cubic root of 1100098981 is about 1032.3110769878.

Adding to 1100098981 its reverse (1898900011), we get a palindrome (2998998992).

The spelling of 1100098981 in words is "one billion, one hundred million, ninety-eight thousand, nine hundred eighty-one".