123220111 has 8 divisors (see below), whose sum is σ = 148234880. Its totient is φ = 100058328.

The previous prime is 123220103. The next prime is 123220117. The reversal of 123220111 is 111022321.

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

It is a cyclic number.

It is not a de Polignac number, because 123220111 - 2³ = 123220103 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123220091 and 123220100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123220117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 463101 + ... + 463366.

It is an arithmetic number, because the mean of its divisors is an integer number (18529360).

Almost surely, 2^123220111 is an apocalyptic number.

123220111 is a deficient number, since it is larger than the sum of its proper divisors (25014769).

123220111 is an equidigital number, since it uses as much as digits as its factorization.

123220111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 926493.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 123220111 is about 11100.4554411069. The cubic root of 123220111 is about 497.6154606893.

Adding to 123220111 its reverse (111022321), we get a palindrome (234242432).

The spelling of 123220111 in words is "one hundred twenty-three million, two hundred twenty thousand, one hundred eleven".