12020122010221 has 6 divisors (see below), whose sum is σ = 13015871762730. Its totient is φ = 11095497240048.

The previous prime is 12020122010137. The next prime is 12020122010263. The reversal of 12020122010221 is 12201022102021.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 403715368996 + 11616406641225 = 635386^2 + 3408285^2 .

It is not a de Polignac number, because 12020122010221 - 2³⁷ = 11882683056749 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12020122010195 and 12020122010204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12020122010921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 35562490986 + ... + 35562491323.

It is an arithmetic number, because the mean of its divisors is an integer number (2169311960455).

Almost surely, 2^{12020122010221} is an apocalyptic number.

It is an amenable number.

12020122010221 is a deficient number, since it is larger than the sum of its proper divisors (995749752509).

12020122010221 is an equidigital number, since it uses as much as digits as its factorization.

12020122010221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71124982335 (or 71124982322 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 12020122010221 its reverse (12201022102021), we get a palindrome (24221144112242).

The spelling of 12020122010221 in words is "twelve trillion, twenty billion, one hundred twenty-two million, ten thousand, two hundred twenty-one".