12212032121 has 16 divisors (see below), whose sum is σ = 12554676288. Its totient is φ = 11872224000.

The previous prime is 12212032099. The next prime is 12212032123. The reversal of 12212032121 is 12123021221.

It is a cyclic number.

It is not a de Polignac number, because 12212032121 - 2⁶ = 12212032057 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12212032121.

It is not an unprimeable number, because it can be changed into a prime (12212032123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13463750 + ... + 13464656.

It is an arithmetic number, because the mean of its divisors is an integer number (784667268).

Almost surely, 2^12212032121 is an apocalyptic number.

It is an amenable number.

12212032121 is a deficient number, since it is larger than the sum of its proper divisors (342644167).

12212032121 is an equidigital number, since it uses as much as digits as its factorization.

12212032121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2072.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 12212032121 its reverse (12123021221), we get a palindrome (24335053342).

The spelling of 12212032121 in words is "twelve billion, two hundred twelve million, thirty-two thousand, one hundred twenty-one".