12122211021111 has 24 divisors (see below), whose sum is σ = 17680171151136. Its totient is φ = 8002871807040.

The previous prime is 12122211021091. The next prime is 12122211021131. The reversal of 12122211021111 is 11112011222121.

It is a happy number.

12122211021111 is a `hidden beast` number, since 1 + 212 + 221 + 10 + 211 + 11 = 666.

It is an interprime number because it is at equal distance from previous prime (12122211021091) and next prime (12122211021131).

It is not a de Polignac number, because 12122211021111 - 2¹⁴ = 12122211004727 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12122211021131) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 92320141 + ... + 92451353.

It is an arithmetic number, because the mean of its divisors is an integer number (736673797964).

Almost surely, 2^{12122211021111} is an apocalyptic number.

12122211021111 is a deficient number, since it is larger than the sum of its proper divisors (5557960130025).

12122211021111 is a wasteful number, since it uses less digits than its factorization.

12122211021111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230983 (or 230980 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 12122211021111 its reverse (11112011222121), we get a palindrome (23234222243232).

The spelling of 12122211021111 in words is "twelve trillion, one hundred twenty-two billion, two hundred eleven million, twenty-one thousand, one hundred eleven".