123547144121 has 16 divisors (see below), whose sum is σ = 128385440640. Its totient is φ = 118748528640.

The previous prime is 123547144093. The next prime is 123547144129. The reversal of 123547144121 is 121441745321.

It is a cyclic number.

It is not a de Polignac number, because 123547144121 - 2³⁰ = 122473402297 is a prime.

It is not an unprimeable number, because it can be changed into a prime (123547144129) 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, 6340025 + ... + 6359481.

It is an arithmetic number, because the mean of its divisors is an integer number (8024090040).

Almost surely, 2^123547144121 is an apocalyptic number.

It is an amenable number.

123547144121 is a deficient number, since it is larger than the sum of its proper divisors (4838296519).

123547144121 is a wasteful number, since it uses less digits than its factorization.

123547144121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20464.

The product of its digits is 26880, while the sum is 35.

Adding to 123547144121 its reverse (121441745321), we get a palindrome (244988889442).

The spelling of 123547144121 in words is "one hundred twenty-three billion, five hundred forty-seven million, one hundred forty-four thousand, one hundred twenty-one".