12101112121111 has 8 divisors (see below), whose sum is σ = 13032296353440. Its totient is φ = 11169974953632.

The previous prime is 12101112121097. The next prime is 12101112121121. The reversal of 12101112121111 is 11112121110121.

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 12101112121111 - 2²³ = 12101103732503 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12101112121121) 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, 11231296 + ... + 12261493.

It is an arithmetic number, because the mean of its divisors is an integer number (1629037044180).

Almost surely, 2^{12101112121111} is an apocalyptic number.

12101112121111 is a deficient number, since it is larger than the sum of its proper divisors (931184232329).

12101112121111 is a wasteful number, since it uses less digits than its factorization.

12101112121111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23532425.

The product of its (nonzero) digits is 8, while the sum is 16.

Adding to 12101112121111 its reverse (11112121110121), we get a palindrome (23213233231232).

The spelling of 12101112121111 in words is "twelve trillion, one hundred one billion, one hundred twelve million, one hundred twenty-one thousand, one hundred eleven".