10000111000981 has 2 divisors, whose sum is σ = 10000111000982. Its totient is φ = 10000111000980.

The previous prime is 10000111000949. The next prime is 10000111001039. The reversal of 10000111000981 is 18900011100001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8415510902500 + 1584600098481 = 2900950^2 + 1258809^2 .

It is a cyclic number.

It is not a de Polignac number, because 10000111000981 - 2⁵ = 10000111000949 is a prime.

It is a super-2 number, since 2×10000111000981² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10000111000921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5000055500490 + 5000055500491.

It is an arithmetic number, because the mean of its divisors is an integer number (5000055500491).

Almost surely, 2^{10000111000981} is an apocalyptic number.

It is an amenable number.

10000111000981 is a deficient number, since it is larger than the sum of its proper divisors (1).

10000111000981 is an equidigital number, since it uses as much as digits as its factorization.

10000111000981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 22.

Adding to 10000111000981 its reverse (18900011100001), we get a palindrome (28900122100982).

The spelling of 10000111000981 in words is "ten trillion, one hundred eleven million, nine hundred eighty-one", and thus it is an aban number.