123120036 has 36 divisors (see below), whose sum is σ = 335161372. Its totient is φ = 37882944.

The previous prime is 123120029. The next prime is 123120047. The reversal of 123120036 is 630021321.

It can be written as a sum of positive squares in 2 ways, for example, as 6350400 + 116769636 = 2520^2 + 10806^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 131071 + ... + 132006.

Almost surely, 2^123120036 is an apocalyptic number.

It is an amenable number.

123120036 is an abundant number, since it is smaller than the sum of its proper divisors (212041336).

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

123120036 is a wasteful number, since it uses less digits than its factorization.

123120036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263100 (or 263095 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 123120036 is about 11095.9468275583. The cubic root of 123120036 is about 497.4807089984.

Adding to 123120036 its reverse (630021321), we get a palindrome (753141357).

The spelling of 123120036 in words is "one hundred twenty-three million, one hundred twenty thousand, thirty-six".