12021001012 has 12 divisors (see below), whose sum is σ = 21245037156. Its totient is φ = 5950990400.

The previous prime is 12021000973. The next prime is 12021001043. The reversal of 12021001012 is 21010012021.

It can be written as a sum of positive squares in 2 ways, for example, as 5258570256 + 6762430756 = 72516^2 + 82234^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 12021001012.

It is a congruent number.

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, 14877073 + ... + 14877880.

It is an arithmetic number, because the mean of its divisors is an integer number (1770419763).

Almost surely, 2^12021001012 is an apocalyptic number.

It is an amenable number.

12021001012 is a deficient number, since it is larger than the sum of its proper divisors (9224036144).

12021001012 is a wasteful number, since it uses less digits than its factorization.

12021001012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29755058 (or 29755056 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 12021001012 its reverse (21010012021), we get a palindrome (33031013033).

The spelling of 12021001012 in words is "twelve billion, twenty-one million, one thousand, twelve".