103121210999 has 4 divisors (see below), whose sum is σ = 107604741936. Its totient is φ = 98637680064.

The previous prime is 103121210981. The next prime is 103121211001. The reversal of 103121210999 is 999012121301.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-103121210999 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 (103121210399) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2241765434 + ... + 2241765479.

It is an arithmetic number, because the mean of its divisors is an integer number (26901185484).

Almost surely, 2^103121210999 is an apocalyptic number.

103121210999 is a deficient number, since it is larger than the sum of its proper divisors (4483530937).

103121210999 is an equidigital number, since it uses as much as digits as its factorization.

103121210999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4483530936.

The product of its (nonzero) digits is 8748, while the sum is 38.

The spelling of 103121210999 in words is "one hundred three billion, one hundred twenty-one million, two hundred ten thousand, nine hundred ninety-nine".