103120999 has 4 divisors (see below), whose sum is σ = 108548440. Its totient is φ = 97693560.

The previous prime is 103120981. The next prime is 103121023. The reversal of 103120999 is 999021301.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 999021301 = 157 ⋅6363193.

It is a cyclic number.

It is not a de Polignac number, because 103120999 - 2²¹ = 101023847 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103120939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2713692 + ... + 2713729.

It is an arithmetic number, because the mean of its divisors is an integer number (27137110).

Almost surely, 2^103120999 is an apocalyptic number.

103120999 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

103120999 is a deficient number, since it is larger than the sum of its proper divisors (5427441).

103120999 is an equidigital number, since it uses as much as digits as its factorization.

103120999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5427440.

The product of its (nonzero) digits is 4374, while the sum is 34.

The square root of 103120999 is about 10154.8510082620. The cubic root of 103120999 is about 468.9382991285.

The spelling of 103120999 in words is "one hundred three million, one hundred twenty thousand, nine hundred ninety-nine".