12121330 has 16 divisors (see below), whose sum is σ = 23496984. Its totient is φ = 4475520.

The previous prime is 12121327. The next prime is 12121331. The reversal of 12121330 is 3312121.

It can be written as a sum of positive squares in 4 ways, for example, as 9186961 + 2934369 = 3031^2 + 1713^2 .

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a self number, because there is not a number n which added to its sum of digits gives 12121330.

It is not an unprimeable number, because it can be changed into a prime (12121331) 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, 46491 + ... + 46750.

Almost surely, 2^12121330 is an apocalyptic number.

12121330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12121330 is a deficient number, since it is larger than the sum of its proper divisors (11375654).

12121330 is a wasteful number, since it uses less digits than its factorization.

12121330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93261.

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

The square root of 12121330 is about 3481.5700481248. The cubic root of 12121330 is about 229.7118635054.

Adding to 12121330 its reverse (3312121), we get a palindrome (15433451).

The spelling of 12121330 in words is "twelve million, one hundred twenty-one thousand, three hundred thirty".