120121129 has 8 divisors (see below), whose sum is σ = 123550920. Its totient is φ = 116701056.

The previous prime is 120121123. The next prime is 120121163. The reversal of 120121129 is 921121021.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 87459904 + 32661225 = 9352^2 + 5715^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 120121129 - 2³ = 120121121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (120121121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27927 + ... + 31939.

It is an arithmetic number, because the mean of its divisors is an integer number (15443865).

Almost surely, 2^120121129 is an apocalyptic number.

It is an amenable number.

120121129 is a deficient number, since it is larger than the sum of its proper divisors (3429791).

120121129 is an equidigital number, since it uses as much as digits as its factorization.

120121129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4859.

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

The square root of 120121129 is about 10959.9785127527. The cubic root of 120121129 is about 493.4083200579.

The spelling of 120121129 in words is "one hundred twenty million, one hundred twenty-one thousand, one hundred twenty-nine".