123216477412 has 18 divisors (see below), whose sum is σ = 250833543702. Its totient is φ = 52807061664.

The previous prime is 123216477409. The next prime is 123216477431. The reversal of 123216477412 is 214774612321.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 120975969856 + 2240507556 = 347816^2 + 47334^2 .

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 5 ways as a sum of consecutive naturals, for example, 314327553 + ... + 314327944.

Almost surely, 2^123216477412 is an apocalyptic number.

It is an amenable number.

123216477412 is an abundant number, since it is smaller than the sum of its proper divisors (127617066290).

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

123216477412 is a wasteful number, since it uses less digits than its factorization.

123216477412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 628655515 (or 628655506 counting only the distinct ones).

The product of its digits is 112896, while the sum is 40.

The spelling of 123216477412 in words is "one hundred twenty-three billion, two hundred sixteen million, four hundred seventy-seven thousand, four hundred twelve".