12021020002120 has 16 divisors (see below), whose sum is σ = 27047295004860. Its totient is φ = 4808408000832.

The previous prime is 12021020002099. The next prime is 12021020002139. The reversal of 12021020002120 is 2120002012021.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 11560421603844 + 460598398276 = 3400062^2 + 678674^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 12021020002120.

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, 150262749987 + ... + 150262750066.

Almost surely, 2^{12021020002120} is an apocalyptic number.

12021020002120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12021020002120 is an abundant number, since it is smaller than the sum of its proper divisors (15026275002740).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12021020002120 is a wasteful number, since it uses less digits than its factorization.

12021020002120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300525500064 (or 300525500060 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 12021020002120 its reverse (2120002012021), we get a palindrome (14141022014141).

The spelling of 12021020002120 in words is "twelve trillion, twenty-one billion, twenty million, two thousand, one hundred twenty".