123154013212 has 24 divisors (see below), whose sum is σ = 218519532000. Its totient is φ = 60725339136.

The previous prime is 123154013209. The next prime is 123154013233. The reversal of 123154013212 is 212310451321.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 594637 + ... + 774532.

It is an arithmetic number, because the mean of its divisors is an integer number (9104980500).

Almost surely, 2^123154013212 is an apocalyptic number.

It is an amenable number.

123154013212 is a deficient number, since it is larger than the sum of its proper divisors (95365518788).

123154013212 is a wasteful number, since it uses less digits than its factorization.

123154013212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1369485 (or 1369483 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

Adding to 123154013212 its reverse (212310451321), we get a palindrome (335464464533).

The spelling of 123154013212 in words is "one hundred twenty-three billion, one hundred fifty-four million, thirteen thousand, two hundred twelve".