123144501212 has 12 divisors (see below), whose sum is σ = 215517447600. Its totient is φ = 61568087616.

The previous prime is 123144501191. The next prime is 123144501239. The reversal of 123144501212 is 212105441321.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 973712 + ... + 1092887.

It is an arithmetic number, because the mean of its divisors is an integer number (17959787300).

Almost surely, 2^123144501212 is an apocalyptic number.

It is an amenable number.

123144501212 is a deficient number, since it is larger than the sum of its proper divisors (92372946388).

123144501212 is a wasteful number, since it uses less digits than its factorization.

123144501212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2081500 (or 2081498 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 26.

Adding to 123144501212 its reverse (212105441321), we get a palindrome (335249942533).

The spelling of 123144501212 in words is "one hundred twenty-three billion, one hundred forty-four million, five hundred one thousand, two hundred twelve".