12101222111 has 8 divisors (see below), whose sum is σ = 13208130000. Its totient is φ = 10995447040.

The previous prime is 12101222101. The next prime is 12101222123. The reversal of 12101222111 is 11122210121.

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 12101222111 - 2¹⁸ = 12100959967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12101222101) 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, 260786 + ... + 303663.

It is an arithmetic number, because the mean of its divisors is an integer number (1651016250).

Almost surely, 2^12101222111 is an apocalyptic number.

12101222111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12101222111 is a deficient number, since it is larger than the sum of its proper divisors (1106907889).

12101222111 is a wasteful number, since it uses less digits than its factorization.

12101222111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 566409.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 12101222111 its reverse (11122210121), we get a palindrome (23223432232).

The spelling of 12101222111 in words is "twelve billion, one hundred one million, two hundred twenty-two thousand, one hundred eleven".