12011211010221 has 32 divisors (see below), whose sum is σ = 16332557160960. Its totient is φ = 7850224072704.

The previous prime is 12011211010217. The next prime is 12011211010247. The reversal of 12011211010221 is 12201011211021.

It is a happy number.

It is not a de Polignac number, because 12011211010221 - 2² = 12011211010217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12011211010221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12011211010021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31504285 + ... + 31883261.

It is an arithmetic number, because the mean of its divisors is an integer number (510392411280).

Almost surely, 2^{12011211010221} is an apocalyptic number.

It is an amenable number.

12011211010221 is a deficient number, since it is larger than the sum of its proper divisors (4321346150739).

12011211010221 is a wasteful number, since it uses less digits than its factorization.

12011211010221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380005.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 12011211010221 its reverse (12201011211021), we get a palindrome (24212222221242).

The spelling of 12011211010221 in words is "twelve trillion, eleven billion, two hundred eleven million, ten thousand, two hundred twenty-one".