11121121990129 has 2 divisors, whose sum is σ = 11121121990130. Its totient is φ = 11121121990128.

The previous prime is 11121121990103. The next prime is 11121121990157. The reversal of 11121121990129 is 92109912112111.

It is a happy number.

11121121990129 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9286329833104 + 1834792157025 = 3047348^2 + 1354545^2 .

It is a cyclic number.

It is not a de Polignac number, because 11121121990129 - 2⁷ = 11121121990001 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11121121990091 and 11121121990100.

It is not a weakly prime, because it can be changed into another prime (11121121990229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5560560995064 + 5560560995065.

It is an arithmetic number, because the mean of its divisors is an integer number (5560560995065).

Almost surely, 2^{11121121990129} is an apocalyptic number.

It is an amenable number.

11121121990129 is a deficient number, since it is larger than the sum of its proper divisors (1).

11121121990129 is an equidigital number, since it uses as much as digits as its factorization.

11121121990129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 40.

The spelling of 11121121990129 in words is "eleven trillion, one hundred twenty-one billion, one hundred twenty-one million, nine hundred ninety thousand, one hundred twenty-nine".