12151221151 has 2 divisors, whose sum is σ = 12151221152. Its totient is φ = 12151221150.

The previous prime is 12151221139. The next prime is 12151221179. The reversal of 12151221151 is 15112215121.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12151221151 - 2²⁵ = 12117666719 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12151221191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6075610575 + 6075610576.

It is an arithmetic number, because the mean of its divisors is an integer number (6075610576).

Almost surely, 2^12151221151 is an apocalyptic number.

12151221151 is a deficient number, since it is larger than the sum of its proper divisors (1).

12151221151 is an equidigital number, since it uses as much as digits as its factorization.

12151221151 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 200, while the sum is 22.

Adding to 12151221151 its reverse (15112215121), we get a palindrome (27263436272).

The spelling of 12151221151 in words is "twelve billion, one hundred fifty-one million, two hundred twenty-one thousand, one hundred fifty-one".