12122011212021 has 16 divisors (see below), whose sum is σ = 18185858361600. Its totient is φ = 7979045353344.

The previous prime is 12122011212011. The next prime is 12122011212053. The reversal of 12122011212021 is 12021211022121.

12122011212021 is a `hidden beast` number, since 121 + 220 + 1 + 121 + 202 + 1 = 666.

It is not a de Polignac number, because 12122011212021 - 2¹⁹ = 12122010687733 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12122011211985 and 12122011212003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12122011212011) 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, 2841538236 + ... + 2841542501.

It is an arithmetic number, because the mean of its divisors is an integer number (1136616147600).

Almost surely, 2^{12122011212021} is an apocalyptic number.

It is an amenable number.

12122011212021 is a deficient number, since it is larger than the sum of its proper divisors (6063847149579).

12122011212021 is an equidigital number, since it uses as much as digits as its factorization.

12122011212021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5683080825 (or 5683080819 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 12122011212021 its reverse (12021211022121), we get a palindrome (24143222234142).

The spelling of 12122011212021 in words is "twelve trillion, one hundred twenty-two billion, eleven million, two hundred twelve thousand, twenty-one".