12212112112211 has 32 divisors (see below), whose sum is σ = 13657182647040. Its totient is φ = 10826223408000.

The previous prime is 12212112112169. The next prime is 12212112112243. The reversal of 12212112112211 is 11221121121221.

It is a happy number.

It is not a de Polignac number, because 12212112112211 - 2⁶ = 12212112112147 is a prime.

It is a super-2 number, since 2×12212112112211² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12212112142211) 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, 799371305 + ... + 799386581.

It is an arithmetic number, because the mean of its divisors is an integer number (426786957720).

Almost surely, 2^{12212112112211} is an apocalyptic number.

12212112112211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12212112112211 is a deficient number, since it is larger than the sum of its proper divisors (1445070534829).

12212112112211 is a wasteful number, since it uses less digits than its factorization.

12212112112211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26195.

The product of its digits is 64, while the sum is 20.

Adding to 12212112112211 its reverse (11221121121221), we get a palindrome (23433233233432).

The spelling of 12212112112211 in words is "twelve trillion, two hundred twelve billion, one hundred twelve million, one hundred twelve thousand, two hundred eleven".