20110121221112 has 64 divisors (see below), whose sum is σ = 40837914180000. Its totient is φ = 9228818824704.

The previous prime is 20110121221109. The next prime is 20110121221121. The reversal of 20110121221112 is 21112212101102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 207501338 + ... + 207598230.

Almost surely, 2^{20110121221112} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20110121221112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20418957090000).

20110121221112 is an abundant number, since it is smaller than the sum of its proper divisors (20727792958888).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20110121221112 is a wasteful number, since it uses less digits than its factorization.

20110121221112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108240 (or 108236 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 20110121221112 its reverse (21112212101102), we get a palindrome (41222333322214).

The spelling of 20110121221112 in words is "twenty trillion, one hundred ten billion, one hundred twenty-one million, two hundred twenty-one thousand, one hundred twelve".