120129998 has 4 divisors (see below), whose sum is σ = 180195000. Its totient is φ = 60064998.

The previous prime is 120129983. The next prime is 120130001. The reversal of 120129998 is 899921021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 899921021 = 7243 ⋅124247.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30032498 + ... + 30032501.

It is an arithmetic number, because the mean of its divisors is an integer number (45048750).

Almost surely, 2^120129998 is an apocalyptic number.

120129998 is a deficient number, since it is larger than the sum of its proper divisors (60065002).

120129998 is an equidigital number, since it uses as much as digits as its factorization.

120129998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60065001.

The product of its (nonzero) digits is 23328, while the sum is 41.

The square root of 120129998 is about 10960.3831137420. The cubic root of 120129998 is about 493.4204631636.

The spelling of 120129998 in words is "one hundred twenty million, one hundred twenty-nine thousand, nine hundred ninety-eight".