12121200324 has 18 divisors (see below), whose sum is σ = 30639700910. Its totient is φ = 4040400096.

The previous prime is 12121200319. The next prime is 12121200331. The reversal of 12121200324 is 42300212121.

It is a happy number.

12121200324 is a `hidden beast` number, since 121 + 21 + 200 + 324 = 666.

It can be written as a sum of positive squares in only one way, i.e., 10739591424 + 1381608900 = 103632^2 + 37170^2 .

It is a tau number, because it is divible by the number of its divisors (18).

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

It is a junction number, because it is equal to n+sod(n) for n = 12121200297 and 12121200306.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 168349969 + ... + 168350040.

Almost surely, 2^12121200324 is an apocalyptic number.

It is an amenable number.

12121200324 is an abundant number, since it is smaller than the sum of its proper divisors (18518500586).

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

12121200324 is a wasteful number, since it uses less digits than its factorization.

12121200324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336700019 (or 336700014 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 12121200324 its reverse (42300212121), we get a palindrome (54421412445).

The spelling of 12121200324 in words is "twelve billion, one hundred twenty-one million, two hundred thousand, three hundred twenty-four".