12012020032221 has 16 divisors (see below), whose sum is σ = 19413365709120. Its totient is φ = 7280012140560.

The previous prime is 12012020032219. The next prime is 12012020032223. The reversal of 12012020032221 is 12223002021021.

12012020032221 is a `hidden beast` number, since 1 + 2 + 0 + 120 + 200 + 322 + 21 = 666.

It is an interprime number because it is at equal distance from previous prime (12012020032219) and next prime (12012020032223).

It is not a de Polignac number, because 12012020032221 - 2¹ = 12012020032219 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12012020032194 and 12012020032203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12012020032223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20222255650 + ... + 20222256243.

It is an arithmetic number, because the mean of its divisors is an integer number (1213335356820).

Almost surely, 2^{12012020032221} is an apocalyptic number.

12012020032221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12012020032221 is a deficient number, since it is larger than the sum of its proper divisors (7401345676899).

12012020032221 is a wasteful number, since it uses less digits than its factorization.

12012020032221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40444511913 (or 40444511907 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 12012020032221 its reverse (12223002021021), we get a palindrome (24235022053242).

The spelling of 12012020032221 in words is "twelve trillion, twelve billion, twenty million, thirty-two thousand, two hundred twenty-one".