12211221122111 has 8 divisors (see below), whose sum is σ = 13443546190800. Its totient is φ = 10999265063040.

The previous prime is 12211221122099. The next prime is 12211221122131. The reversal of 12211221122111 is 11122112211221.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12211221122111 - 2¹⁰ = 12211221121087 is a prime.

It is a super-2 number, since 2×12211221122111² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12211221122131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5092251146 + ... + 5092253543.

It is an arithmetic number, because the mean of its divisors is an integer number (1680443273850).

Almost surely, 2^{12211221122111} is an apocalyptic number.

12211221122111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12211221122111 is a deficient number, since it is larger than the sum of its proper divisors (1232325068689).

12211221122111 is a wasteful number, since it uses less digits than its factorization.

12211221122111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10184504809.

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

Adding to 12211221122111 its reverse (11122112211221), we get a palindrome (23333333333332).

It can be divided in two parts, 122112211221 and 11, that multiplied together give a palindrome (1343234323431).

The spelling of 12211221122111 in words is "twelve trillion, two hundred eleven billion, two hundred twenty-one million, one hundred twenty-two thousand, one hundred eleven".