12021020012 has 12 divisors (see below), whose sum is σ = 21951428016. Its totient is φ = 5749183440.

The previous prime is 12021019949. The next prime is 12021020129. The reversal of 12021020012 is 21002012021.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 12021019975 and 12021020002.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65331539 + ... + 65331722.

It is an arithmetic number, because the mean of its divisors is an integer number (1829285668).

Almost surely, 2^12021020012 is an apocalyptic number.

It is an amenable number.

12021020012 is a deficient number, since it is larger than the sum of its proper divisors (9930408004).

12021020012 is a wasteful number, since it uses less digits than its factorization.

12021020012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130663288 (or 130663286 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 12021020012 its reverse (21002012021), we get a palindrome (33023032033).

The spelling of 12021020012 in words is "twelve billion, twenty-one million, twenty thousand, twelve".