123211310012 has 24 divisors (see below), whose sum is σ = 246509456256. Its totient is φ = 52786239408.

The previous prime is 123211309999. The next prime is 123211310069. The reversal of 123211310012 is 210013112321.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 694298 + ... + 853505.

It is an arithmetic number, because the mean of its divisors is an integer number (10271227344).

Almost surely, 2^123211310012 is an apocalyptic number.

It is an amenable number.

123211310012 is an abundant number, since it is smaller than the sum of its proper divisors (123298146244).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123211310012 is a wasteful number, since it uses less digits than its factorization.

123211310012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1550657 (or 1550655 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 123211310012 its reverse (210013112321), we get a palindrome (333224422333).

The spelling of 123211310012 in words is "one hundred twenty-three billion, two hundred eleven million, three hundred ten thousand, twelve".