12212122221101 has 32 divisors (see below), whose sum is σ = 14453036623872. Its totient is φ = 10193244629760.

The previous prime is 12212122221043. The next prime is 12212122221107. The reversal of 12212122221101 is 10112222121221.

It is not a de Polignac number, because 12212122221101 - 2²⁶ = 12212055112237 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12212122221107) 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, 435230 + ... + 4961216.

It is an arithmetic number, because the mean of its divisors is an integer number (451657394496).

Almost surely, 2^{12212122221101} is an apocalyptic number.

12212122221101 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12212122221101 is a deficient number, since it is larger than the sum of its proper divisors (2240914402771).

12212122221101 is a wasteful number, since it uses less digits than its factorization.

12212122221101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4526369.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 12212122221101 its reverse (10112222121221), we get a palindrome (22324344342322).

The spelling of 12212122221101 in words is "twelve trillion, two hundred twelve billion, one hundred twenty-two million, two hundred twenty-one thousand, one hundred one".