11111114506981 has 2 divisors, whose sum is σ = 11111114506982. Its totient is φ = 11111114506980.

The previous prime is 11111114506957. The next prime is 11111114507029. The reversal of 11111114506981 is 18960541111111.

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., 7399847110756 + 3711267396225 = 2720266^2 + 1926465^2 .

It is a cyclic number.

It is not a de Polignac number, because 11111114506981 - 2¹⁷ = 11111114375909 is a prime.

It is a super-2 number, since 2×11111114506981² (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 (11111114506381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5555557253490 + 5555557253491.

It is an arithmetic number, because the mean of its divisors is an integer number (5555557253491).

Almost surely, 2^{11111114506981} is an apocalyptic number.

It is an amenable number.

11111114506981 is a deficient number, since it is larger than the sum of its proper divisors (1).

11111114506981 is an equidigital number, since it uses as much as digits as its factorization.

11111114506981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 40.

The spelling of 11111114506981 in words is "eleven trillion, one hundred eleven billion, one hundred fourteen million, five hundred six thousand, nine hundred eighty-one".