12121250 has 20 divisors (see below), whose sum is σ = 22722414. Its totient is φ = 4848000.

The previous prime is 12121231. The next prime is 12121267. The reversal of 12121250 is 5212121.

12121250 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 5 ways, for example, as 128881 + 11992369 = 359^2 + 3463^2 .

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 3599 + ... + 6098.

Almost surely, 2^12121250 is an apocalyptic number.

12121250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12121250 is a deficient number, since it is larger than the sum of its proper divisors (10601164).

12121250 is an frugal number, since it uses more digits than its factorization.

12121250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9719 (or 9704 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 14.

The square root of 12121250 is about 3481.5585590365. The cubic root of 12121250 is about 229.7113581431.

Adding to 12121250 its reverse (5212121), we get a palindrome (17333371).

The spelling of 12121250 in words is "twelve million, one hundred twenty-one thousand, two hundred fifty".