12151811 has 8 divisors (see below), whose sum is σ = 14618880. Its totient is φ = 9867528.

The previous prime is 12151801. The next prime is 12151823. The reversal of 12151811 is 11815121.

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

It is a cyclic number.

It is not a de Polignac number, because 12151811 - 2⁶ = 12151747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12151801) 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 7 ways as a sum of consecutive naturals, for example, 45551 + ... + 45816.

It is an arithmetic number, because the mean of its divisors is an integer number (1827360).

Almost surely, 2^12151811 is an apocalyptic number.

12151811 is a deficient number, since it is larger than the sum of its proper divisors (2467069).

12151811 is an equidigital number, since it uses as much as digits as its factorization.

12151811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91393.

The product of its digits is 80, while the sum is 20.

The square root of 12151811 is about 3485.9447786791. The cubic root of 12151811 is about 229.9042512608.

Adding to 12151811 its reverse (11815121), we get a palindrome (23966932).

The spelling of 12151811 in words is "twelve million, one hundred fifty-one thousand, eight hundred eleven".