121102129 has 2 divisors, whose sum is σ = 121102130. Its totient is φ = 121102128.

The previous prime is 121102049. The next prime is 121102133. The reversal of 121102129 is 921201121.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85377600 + 35724529 = 9240^2 + 5977^2 .

It is an emirp because it is prime and its reverse (921201121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121102129 - 2⁷ = 121102001 is a prime.

It is not a weakly prime, because it can be changed into another prime (121102159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60551064 + 60551065.

It is an arithmetic number, because the mean of its divisors is an integer number (60551065).

Almost surely, 2^121102129 is an apocalyptic number.

It is an amenable number.

121102129 is a deficient number, since it is larger than the sum of its proper divisors (1).

121102129 is an equidigital number, since it uses as much as digits as its factorization.

121102129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 19.

The square root of 121102129 is about 11004.6412481280. The cubic root of 121102129 is about 494.7478619314.

The spelling of 121102129 in words is "one hundred twenty-one million, one hundred two thousand, one hundred twenty-nine".