123420112 has 10 divisors (see below), whose sum is σ = 239126498. Its totient is φ = 61710048.

The previous prime is 123420071. The next prime is 123420137. The reversal of 123420112 is 211024321.

It can be written as a sum of positive squares in only one way, i.e., 122412096 + 1008016 = 11064^2 + 1004^2 .

It is a Harshad number since it is a multiple of its sum of digits (16), and also a Moran number because the ratio is a prime number: 7713757 = 123420112 / (1 + 2 + 3 + 4 + 2 + 0 + 1 + 1 + 2).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3856863 + ... + 3856894.

Almost surely, 2^123420112 is an apocalyptic number.

It is an amenable number.

123420112 is a deficient number, since it is larger than the sum of its proper divisors (115706386).

123420112 is an equidigital number, since it uses as much as digits as its factorization.

123420112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7713765 (or 7713759 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 123420112 is about 11109.4604729483. The cubic root of 123420112 is about 497.8845449895.

Adding to 123420112 its reverse (211024321), we get a palindrome (334444433).

The spelling of 123420112 in words is "one hundred twenty-three million, four hundred twenty thousand, one hundred twelve".