12212132121 has 48 divisors (see below), whose sum is σ = 21866277888. Its totient is φ = 6407654400.

The previous prime is 12212132089. The next prime is 12212132123. The reversal of 12212132121 is 12123121221.

It is not a de Polignac number, because 12212132121 - 2⁵ = 12212132089 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12212132094 and 12212132103.

It is not an unprimeable number, because it can be changed into a prime (12212132123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 95145 + ... + 182966.

It is an arithmetic number, because the mean of its divisors is an integer number (455547456).

Almost surely, 2^12212132121 is an apocalyptic number.

It is an amenable number.

12212132121 is a deficient number, since it is larger than the sum of its proper divisors (9654145767).

12212132121 is a wasteful number, since it uses less digits than its factorization.

12212132121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278182 (or 278179 counting only the distinct ones).

The product of its digits is 96, while the sum is 18.

Adding to 12212132121 its reverse (12123121221), we get a palindrome (24335253342).

The spelling of 12212132121 in words is "twelve billion, two hundred twelve million, one hundred thirty-two thousand, one hundred twenty-one".