12144154221551 has 16 divisors (see below), whose sum is σ = 13530373608960. Its totient is φ = 10804980502080.

The previous prime is 12144154221487. The next prime is 12144154221571. The reversal of 12144154221551 is 15512245144121.

It is a cyclic number.

It is not a de Polignac number, because 12144154221551 - 2⁶ = 12144154221487 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12144154221571) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22761920 + ... + 23289338.

It is an arithmetic number, because the mean of its divisors is an integer number (845648350560).

Almost surely, 2^{12144154221551} is an apocalyptic number.

12144154221551 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12144154221551 is a deficient number, since it is larger than the sum of its proper divisors (1386219387409).

12144154221551 is a wasteful number, since it uses less digits than its factorization.

12144154221551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 572014.

The product of its digits is 64000, while the sum is 38.

Adding to 12144154221551 its reverse (15512245144121), we get a palindrome (27656399365672).

The spelling of 12144154221551 in words is "twelve trillion, one hundred forty-four billion, one hundred fifty-four million, two hundred twenty-one thousand, five hundred fifty-one".