120001000123 has 4 divisors (see below), whose sum is σ = 120211898760. Its totient is φ = 119790101488.

The previous prime is 120001000087. The next prime is 120001000129. The reversal of 120001000123 is 321000100021.

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-120001000123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (120001000129) 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, 105448465 + ... + 105449602.

It is an arithmetic number, because the mean of its divisors is an integer number (30052974690).

Almost surely, 2^120001000123 is an apocalyptic number.

120001000123 is a deficient number, since it is larger than the sum of its proper divisors (210898637).

120001000123 is an equidigital number, since it uses as much as digits as its factorization.

120001000123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210898636.

The product of its (nonzero) digits is 12, while the sum is 10.

Adding to 120001000123 its reverse (321000100021), we get a palindrome (441001100144).

The spelling of 120001000123 in words is "one hundred twenty billion, one million, one hundred twenty-three", and thus it is an aban number.