12120202221 has 16 divisors (see below), whose sum is σ = 16950169344. Its totient is φ = 7694478144.

The previous prime is 12120202219. The next prime is 12120202253. The reversal of 12120202221 is 12220202121.

It is not a de Polignac number, because 12120202221 - 2¹ = 12120202219 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12120202221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12120202271) 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, 1156390 + ... + 1166823.

It is an arithmetic number, because the mean of its divisors is an integer number (1059385584).

Almost surely, 2^12120202221 is an apocalyptic number.

It is an amenable number.

12120202221 is a deficient number, since it is larger than the sum of its proper divisors (4829967123).

12120202221 is a wasteful number, since it uses less digits than its factorization.

12120202221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2323300.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 12120202221 its reverse (12220202121), we get a palindrome (24340404342).

The spelling of 12120202221 in words is "twelve billion, one hundred twenty million, two hundred two thousand, two hundred twenty-one".