12102211121 has 64 divisors (see below), whose sum is σ = 16779958272. Its totient is φ = 8424000000.

The previous prime is 12102211103. The next prime is 12102211129. The reversal of 12102211121 is 12111220121.

It is a de Polignac number, because none of the positive numbers 2^k-12102211121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12102211096 and 12102211105.

It is not an unprimeable number, because it can be changed into a prime (12102211129) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5375246 + ... + 5377496.

It is an arithmetic number, because the mean of its divisors is an integer number (262186848).

Almost surely, 2^12102211121 is an apocalyptic number.

12102211121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12102211121 is a deficient number, since it is larger than the sum of its proper divisors (4677747151).

12102211121 is a wasteful number, since it uses less digits than its factorization.

12102211121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2454.

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

Adding to 12102211121 its reverse (12111220121), we get a palindrome (24213431242).

The spelling of 12102211121 in words is "twelve billion, one hundred two million, two hundred eleven thousand, one hundred twenty-one".