11100121129 has 2 divisors, whose sum is σ = 11100121130. Its totient is φ = 11100121128.

The previous prime is 11100121121. The next prime is 11100121187. The reversal of 11100121129 is 92112100111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6561000000 + 4539121129 = 81000^2 + 67373^2 .

It is a cyclic number.

It is not a de Polignac number, because 11100121129 - 2³ = 11100121121 is a prime.

It is not a weakly prime, because it can be changed into another prime (11100121121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5550060564 + 5550060565.

It is an arithmetic number, because the mean of its divisors is an integer number (5550060565).

Almost surely, 2^11100121129 is an apocalyptic number.

It is an amenable number.

11100121129 is a deficient number, since it is larger than the sum of its proper divisors (1).

11100121129 is an equidigital number, since it uses as much as digits as its factorization.

11100121129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 19.

The spelling of 11100121129 in words is "eleven billion, one hundred million, one hundred twenty-one thousand, one hundred twenty-nine".