123212021312 has 28 divisors (see below), whose sum is σ = 244945905840. Its totient is φ = 61493367936.

The previous prime is 123212021213. The next prime is 123212021333. The reversal of 123212021312 is 213120212321.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1724762 + ... + 1794777.

Almost surely, 2^123212021312 is an apocalyptic number.

It is an amenable number.

123212021312 is a deficient number, since it is larger than the sum of its proper divisors (121733884528).

123212021312 is an equidigital number, since it uses as much as digits as its factorization.

123212021312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3520098 (or 3520088 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 123212021312 its reverse (213120212321), we get a palindrome (336332233633).

The spelling of 123212021312 in words is "one hundred twenty-three billion, two hundred twelve million, twenty-one thousand, three hundred twelve".