123130120 has 32 divisors (see below), whose sum is σ = 279077400. Its totient is φ = 48890368.

The previous prime is 123130097. The next prime is 123130129. The reversal of 123130120 is 21031321.

It can be written as a sum of positive squares in 4 ways, for example, as 113507716 + 9622404 = 10654^2 + 3102^2 .

It is a super-2 number, since 2×123130120² = 30322052902428800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 123130120.

It is not an unprimeable number, because it can be changed into a prime (123130129) 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, 5755 + ... + 16714.

Almost surely, 2^123130120 is an apocalyptic number.

123130120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123130120 is an abundant number, since it is smaller than the sum of its proper divisors (155947280).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123130120 is a wasteful number, since it uses less digits than its factorization.

123130120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22617 (or 22613 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 123130120 is about 11096.4012184131. The cubic root of 123130120 is about 497.4942904827.

Adding to 123130120 its reverse (21031321), we get a palindrome (144161441).

It can be divided in two parts, 1231301 and 20, that added together give a palindrome (1231321).

The spelling of 123130120 in words is "one hundred twenty-three million, one hundred thirty thousand, one hundred twenty".