12211001012121 has 32 divisors (see below), whose sum is σ = 16585090212480. Its totient is φ = 7989395212800.

The previous prime is 12211001011997. The next prime is 12211001012141. The reversal of 12211001012121 is 12121010011221.

It is a happy number.

It is not a de Polignac number, because 12211001012121 - 2¹⁸ = 12211000749977 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12211001012121.

It is not an unprimeable number, because it can be changed into a prime (12211001012141) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 279067581 + ... + 279111333.

It is an arithmetic number, because the mean of its divisors is an integer number (518284069140).

Almost surely, 2^{12211001012121} is an apocalyptic number.

It is an amenable number.

12211001012121 is a deficient number, since it is larger than the sum of its proper divisors (4374089200359).

12211001012121 is a wasteful number, since it uses less digits than its factorization.

12211001012121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47177.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 12211001012121 its reverse (12121010011221), we get a palindrome (24332011023342).

The spelling of 12211001012121 in words is "twelve trillion, two hundred eleven billion, one million, twelve thousand, one hundred twenty-one".