12212210012121 has 40 divisors (see below), whose sum is σ = 21100257630144. Its totient is φ = 6894328517280.

The previous prime is 12212210012071. The next prime is 12212210012237. The reversal of 12212210012121 is 12121001221221.

12212210012121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12212210012121 - 2¹⁷ = 12212209881049 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12212210012094 and 12212210012103.

It is not an unprimeable number, because it can be changed into a prime (12212210212121) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 129701670 + ... + 129795791.

Almost surely, 2^{12212210012121} is an apocalyptic number.

It is an amenable number.

12212210012121 is a deficient number, since it is larger than the sum of its proper divisors (8888047618023).

12212210012121 is an equidigital number, since it uses as much as digits as its factorization.

12212210012121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259497563 (or 259497554 counting only the distinct ones).

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

Adding to 12212210012121 its reverse (12121001221221), we get a palindrome (24333211233342).

The spelling of 12212210012121 in words is "twelve trillion, two hundred twelve billion, two hundred ten million, twelve thousand, one hundred twenty-one".