12122020212121 has 8 divisors (see below), whose sum is σ = 12126716065800. Its totient is φ = 12117324727680.

The previous prime is 12122020212103. The next prime is 12122020212199. The reversal of 12122020212121 is 12121202022121.

It can be written as a sum of positive squares in 4 ways, for example, as 9849780526096 + 2272239686025 = 3138436^2 + 1507395^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12122020212121 - 2¹¹ = 12122020210073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12122020272121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78235795 + ... + 78390583.

It is an arithmetic number, because the mean of its divisors is an integer number (1515839508225).

Almost surely, 2^{12122020212121} is an apocalyptic number.

It is an amenable number.

12122020212121 is a deficient number, since it is larger than the sum of its proper divisors (4695853679).

12122020212121 is a wasteful number, since it uses less digits than its factorization.

12122020212121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184619.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 12122020212121 its reverse (12121202022121), we get a palindrome (24243222234242).

The spelling of 12122020212121 in words is "twelve trillion, one hundred twenty-two billion, twenty million, two hundred twelve thousand, one hundred twenty-one".