12120100 has 36 divisors (see below), whose sum is σ = 27689200. Its totient is φ = 4592160.

The previous prime is 12120091. The next prime is 12120179. The reversal of 12120100 is 102121.

12120100 = T₁₁₂₀ + T₁₁₂₁ + ... + T₁₁₃₈.

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, 1290 + ... + 5089.

Almost surely, 2^12120100 is an apocalyptic number.

12120100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12120100 is an abundant number, since it is smaller than the sum of its proper divisors (15569100).

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

12120100 is a wasteful number, since it uses less digits than its factorization.

12120100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6412 (or 6405 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 7.

The square root of 12120100 is about 3481.3933992010. The cubic root of 12120100 is about 229.7040933143.

Adding to 12120100 its reverse (102121), we get a palindrome (12222221).

The spelling of 12120100 in words is "twelve million, one hundred twenty thousand, one hundred".