12121154 has 8 divisors (see below), whose sum is σ = 18401040. Its totient is φ = 5987476.

The previous prime is 12121147. The next prime is 12121157. The reversal of 12121154 is 45112121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (12121157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36344 + ... + 36675.

It is an arithmetic number, because the mean of its divisors is an integer number (2300130).

Almost surely, 2^12121154 is an apocalyptic number.

12121154 is a deficient number, since it is larger than the sum of its proper divisors (6279886).

12121154 is an equidigital number, since it uses as much as digits as its factorization.

12121154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73104.

The product of its digits is 80, while the sum is 17.

The square root of 12121154 is about 3481.5447720803. The cubic root of 12121154 is about 229.7107517054.

Adding to 12121154 its reverse (45112121), we get a palindrome (57233275).

The spelling of 12121154 in words is "twelve million, one hundred twenty-one thousand, one hundred fifty-four".