12210112112121 has 48 divisors (see below), whose sum is σ = 22803172374528. Its totient is φ = 6342915373200.

The previous prime is 12210112112119. The next prime is 12210112112137. The reversal of 12210112112121 is 12121121101221.

It is a happy number.

It is not a de Polignac number, because 12210112112121 - 2¹ = 12210112112119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12210112112094 and 12210112112103.

It is not an unprimeable number, because it can be changed into a prime (12210112112141) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 326262945 + ... + 326300366.

It is an arithmetic number, because the mean of its divisors is an integer number (475066091136).

Almost surely, 2^{12210112112121} is an apocalyptic number.

12210112112121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12210112112121 is a deficient number, since it is larger than the sum of its proper divisors (10593060262407).

12210112112121 is an equidigital number, since it uses as much as digits as its factorization.

12210112112121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 652563344 (or 652563332 counting only the distinct ones).

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

Adding to 12210112112121 its reverse (12121121101221), we get a palindrome (24331233213342).

The spelling of 12210112112121 in words is "twelve trillion, two hundred ten billion, one hundred twelve million, one hundred twelve thousand, one hundred twenty-one".