12021220221101 has 32 divisors (see below), whose sum is σ = 14812164864000. Its totient is φ = 9500488268544.

The previous prime is 12021220221083. The next prime is 12021220221139. The reversal of 12021220221101 is 10112202212021.

It is a de Polignac number, because none of the positive numbers 2^k-12021220221101 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 12021220221101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12021220220101) 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, 571802276 + ... + 571823298.

It is an arithmetic number, because the mean of its divisors is an integer number (462880152000).

Almost surely, 2^{12021220221101} is an apocalyptic number.

It is an amenable number.

12021220221101 is a deficient number, since it is larger than the sum of its proper divisors (2790944642899).

12021220221101 is a wasteful number, since it uses less digits than its factorization.

12021220221101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27885.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 12021220221101 its reverse (10112202212021), we get a palindrome (22133422433122).

The spelling of 12021220221101 in words is "twelve trillion, twenty-one billion, two hundred twenty million, two hundred twenty-one thousand, one hundred one".