123212120404 has 6 divisors (see below), whose sum is σ = 215621210714. Its totient is φ = 61606060200.

The previous prime is 123212120389. The next prime is 123212120443. The reversal of 123212120404 is 404021212321.

It can be written as a sum of positive squares in only one way, i.e., 72135216400 + 51076904004 = 268580^2 + 226002^2 .

It is a super-3 number, since 3×123212120404³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15401515047 + ... + 15401515054.

Almost surely, 2^123212120404 is an apocalyptic number.

It is an amenable number.

123212120404 is a deficient number, since it is larger than the sum of its proper divisors (92409090310).

123212120404 is a wasteful number, since it uses less digits than its factorization.

123212120404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30803030105 (or 30803030103 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 123212120404 its reverse (404021212321), we get a palindrome (527233332725).

The spelling of 123212120404 in words is "one hundred twenty-three billion, two hundred twelve million, one hundred twenty thousand, four hundred four".