123220043 has 4 divisors (see below), whose sum is σ = 127469040. Its totient is φ = 118971048.

The previous prime is 123219977. The next prime is 123220051. The reversal of 123220043 is 340022321.

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

It is a cyclic number.

It is not a de Polignac number, because 123220043 - 2¹⁴ = 123203659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123223043) 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, 2124455 + ... + 2124512.

It is an arithmetic number, because the mean of its divisors is an integer number (31867260).

Almost surely, 2^123220043 is an apocalyptic number.

123220043 is a deficient number, since it is larger than the sum of its proper divisors (4248997).

123220043 is an equidigital number, since it uses as much as digits as its factorization.

123220043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4248996.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 123220043 is about 11100.4523781691. The cubic root of 123220043 is about 497.6153691516.

Adding to 123220043 its reverse (340022321), we get a palindrome (463242364).

The spelling of 123220043 in words is "one hundred twenty-three million, two hundred twenty thousand, forty-three".