123123121043 has 8 divisors (see below), whose sum is σ = 133606301136. Its totient is φ = 112784536800.

The previous prime is 123123121039. The next prime is 123123121063. The reversal of 123123121043 is 340121321321.

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

It is not a de Polignac number, because 123123121043 - 2² = 123123121039 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123123121063) 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, 36147188 + ... + 36150593.

It is an arithmetic number, because the mean of its divisors is an integer number (16700787642).

Almost surely, 2^123123121043 is an apocalyptic number.

123123121043 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

123123121043 is a deficient number, since it is larger than the sum of its proper divisors (10483180093).

123123121043 is a wasteful number, since it uses less digits than its factorization.

123123121043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72297925.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 123123121043 its reverse (340121321321), we get a palindrome (463244442364).

The spelling of 123123121043 in words is "one hundred twenty-three billion, one hundred twenty-three million, one hundred twenty-one thousand, forty-three".