12151223541 has 48 divisors (see below), whose sum is σ = 18639219456. Its totient is φ = 7612247808.

The previous prime is 12151223533. The next prime is 12151223549. The reversal of 12151223541 is 14532215121.

It is a happy number.

12151223541 is a `hidden beast` number, since 121 + 512 + 23 + 5 + 4 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (12151223533) and next prime (12151223549).

It is not a de Polignac number, because 12151223541 - 2³ = 12151223533 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12151223549) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4184296 + ... + 4187198.

It is an arithmetic number, because the mean of its divisors is an integer number (388317072).

Almost surely, 2^12151223541 is an apocalyptic number.

It is an amenable number.

12151223541 is a deficient number, since it is larger than the sum of its proper divisors (6487995915).

12151223541 is a wasteful number, since it uses less digits than its factorization.

12151223541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3282 (or 3279 counting only the distinct ones).

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

Adding to 12151223541 its reverse (14532215121), we get a palindrome (26683438662).

The spelling of 12151223541 in words is "twelve billion, one hundred fifty-one million, two hundred twenty-three thousand, five hundred forty-one".