12212002202121 has 48 divisors (see below), whose sum is σ = 18889454048400. Its totient is φ = 7575367962624.

The previous prime is 12212002202111. The next prime is 12212002202219. The reversal of 12212002202121 is 12120220021221.

It is a happy number.

12212002202121 is a `hidden beast` number, since 1 + 221 + 200 + 220 + 2 + 1 + 21 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 300703076496 + 11911299125625 = 548364^2 + 3451275^2 .

It is not a de Polignac number, because 12212002202121 - 2³⁴ = 12194822332937 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12212002202094 and 12212002202103.

It is not an unprimeable number, because it can be changed into a prime (12212002202111) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 114724495 + ... + 114830891.

It is an arithmetic number, because the mean of its divisors is an integer number (393530292675).

Almost surely, 2^{12212002202121} is an apocalyptic number.

It is an amenable number.

12212002202121 is a deficient number, since it is larger than the sum of its proper divisors (6677451846279).

12212002202121 is a wasteful number, since it uses less digits than its factorization.

12212002202121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114938 (or 114935 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 12212002202121 its reverse (12120220021221), we get a palindrome (24332222223342).

The spelling of 12212002202121 in words is "twelve trillion, two hundred twelve billion, two million, two hundred two thousand, one hundred twenty-one".