12215243151 has 10 divisors (see below), whose sum is σ = 18247462112. Its totient is φ = 8143495380.

The previous prime is 12215243143. The next prime is 12215243219. The reversal of 12215243151 is 15134251221.

It is a happy number.

12215243151 is a `hidden beast` number, since 1 + 221 + 5 + 2 + 431 + 5 + 1 = 666.

12215243151 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12215243151 - 2³ = 12215243143 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12215243141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 75402655 + ... + 75402816.

Almost surely, 2^12215243151 is an apocalyptic number.

12215243151 is a deficient number, since it is larger than the sum of its proper divisors (6032218961).

12215243151 is an equidigital number, since it uses as much as digits as its factorization.

12215243151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150805483 (or 150805474 counting only the distinct ones).

The product of its digits is 2400, while the sum is 27.

Adding to 12215243151 its reverse (15134251221), we get a palindrome (27349494372).

The spelling of 12215243151 in words is "twelve billion, two hundred fifteen million, two hundred forty-three thousand, one hundred fifty-one".