12123552154 has 16 divisors (see below), whose sum is σ = 21290141376. Its totient is φ = 5069080800.

The previous prime is 12123552107. The next prime is 12123552157. The reversal of 12123552154 is 45125532121.

It is not an unprimeable number, because it can be changed into a prime (12123552157) 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 in 7 ways as a sum of consecutive naturals, for example, 10560012 + ... + 10561159.

It is an arithmetic number, because the mean of its divisors is an integer number (1330633836).

Almost surely, 2^12123552154 is an apocalyptic number.

12123552154 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

12123552154 is a deficient number, since it is larger than the sum of its proper divisors (9166589222).

12123552154 is a wasteful number, since it uses less digits than its factorization.

12123552154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21121221.

The product of its digits is 12000, while the sum is 31.

The spelling of 12123552154 in words is "twelve billion, one hundred twenty-three million, five hundred fifty-two thousand, one hundred fifty-four".