12210011121 has 32 divisors (see below), whose sum is σ = 20769205248. Its totient is φ = 6195349440.

The previous prime is 12210011117. The next prime is 12210011129. The reversal of 12210011121 is 12111001221.

It is not a de Polignac number, because 12210011121 - 2² = 12210011117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12210011097 and 12210011106.

It is not an unprimeable number, because it can be changed into a prime (12210011129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 604686 + ... + 624551.

It is an arithmetic number, because the mean of its divisors is an integer number (649037664).

Almost surely, 2^12210011121 is an apocalyptic number.

12210011121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12210011121 is a deficient number, since it is larger than the sum of its proper divisors (8559194127).

12210011121 is a wasteful number, since it uses less digits than its factorization.

12210011121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1229301.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 12210011121 its reverse (12111001221), we get a palindrome (24321012342).

The spelling of 12210011121 in words is "twelve billion, two hundred ten million, eleven thousand, one hundred twenty-one".