123121321412 has 36 divisors (see below), whose sum is σ = 230514538716. Its totient is φ = 57521664000.

The previous prime is 123121321409. The next prime is 123121321439. The reversal of 123121321412 is 214123121321.

It can be written as a sum of positive squares in 2 ways, for example, as 83669033536 + 39452287876 = 289256^2 + 198626^2 .

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 11 ways as a sum of consecutive naturals, for example, 478589 + ... + 689412.

It is an arithmetic number, because the mean of its divisors is an integer number (6403181631).

Almost surely, 2^123121321412 is an apocalyptic number.

It is an amenable number.

123121321412 is a deficient number, since it is larger than the sum of its proper divisors (107393217304).

123121321412 is a wasteful number, since it uses less digits than its factorization.

123121321412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1168116 (or 1168095 counting only the distinct ones).

The product of its digits is 576, while the sum is 23.

Adding to 123121321412 its reverse (214123121321), we get a palindrome (337244442733).

The spelling of 123121321412 in words is "one hundred twenty-three billion, one hundred twenty-one million, three hundred twenty-one thousand, four hundred twelve".