20121110202221 has 8 divisors (see below), whose sum is σ = 22995981890304. Its totient is φ = 17246345357520.

The previous prime is 20121110202217. The next prime is 20121110202233. The reversal of 20121110202221 is 12220201112102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20121110202221 - 2² = 20121110202217 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20121110202221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121110202121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26306885 + ... + 27060938.

It is an arithmetic number, because the mean of its divisors is an integer number (2874497736288).

Almost surely, 2^{20121110202221} is an apocalyptic number.

It is an amenable number.

20121110202221 is a deficient number, since it is larger than the sum of its proper divisors (2874871688083).

20121110202221 is an equidigital number, since it uses as much as digits as its factorization.

20121110202221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53421691.

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

Adding to 20121110202221 its reverse (12220201112102), we get a palindrome (32341311314323).

The spelling of 20121110202221 in words is "twenty trillion, one hundred twenty-one billion, one hundred ten million, two hundred two thousand, two hundred twenty-one".