11111111109929 has 2 divisors, whose sum is σ = 11111111109930. Its totient is φ = 11111111109928.

The previous prime is 11111111109911. The next prime is 11111111109949. The reversal of 11111111109929 is 92990111111111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11107902453904 + 3208656025 = 3332852^2 + 56645^2 .

It is a cyclic number.

It is not a de Polignac number, because 11111111109929 - 2³² = 11106816142633 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11111111109892 and 11111111109901.

It is not a weakly prime, because it can be changed into another prime (11111111109949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5555555554964 + 5555555554965.

It is an arithmetic number, because the mean of its divisors is an integer number (5555555554965).

Almost surely, 2^{11111111109929} is an apocalyptic number.

It is an amenable number.

11111111109929 is a deficient number, since it is larger than the sum of its proper divisors (1).

11111111109929 is an equidigital number, since it uses as much as digits as its factorization.

11111111109929 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1458, while the sum is 38.

The spelling of 11111111109929 in words is "eleven trillion, one hundred eleven billion, one hundred eleven million, one hundred nine thousand, nine hundred twenty-nine".