121112129 has 2 divisors, whose sum is σ = 121112130. Its totient is φ = 121112128.

The previous prime is 121112113. The next prime is 121112171. The reversal of 121112129 is 921211121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 118222129 + 2890000 = 10873^2 + 1700^2 .

It is a cyclic number.

It is not a de Polignac number, because 121112129 - 2⁴ = 121112113 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121112129.

It is not a weakly prime, because it can be changed into another prime (121114129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60556064 + 60556065.

It is an arithmetic number, because the mean of its divisors is an integer number (60556065).

Almost surely, 2^121112129 is an apocalyptic number.

It is an amenable number.

121112129 is a deficient number, since it is larger than the sum of its proper divisors (1).

121112129 is an equidigital number, since it uses as much as digits as its factorization.

121112129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72, while the sum is 20.

The square root of 121112129 is about 11005.0955924971. The cubic root of 121112129 is about 494.7614794802.

The spelling of 121112129 in words is "one hundred twenty-one million, one hundred twelve thousand, one hundred twenty-nine".