20112001221102 has 128 divisors (see below), whose sum is σ = 49147765555200. Its totient is φ = 5358985422336.

The previous prime is 20112001221017. The next prime is 20112001221199. The reversal of 20112001221102 is 20112210021102.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 20771823 + ... + 21718485.

It is an arithmetic number, because the mean of its divisors is an integer number (383966918400).

Almost surely, 2^{20112001221102} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20112001221102, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24573882777600).

20112001221102 is an abundant number, since it is smaller than the sum of its proper divisors (29035764334098).

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

20112001221102 is a wasteful number, since it uses less digits than its factorization.

20112001221102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 947110.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 20112001221102 its reverse (20112210021102), we get a palindrome (40224211242204).

The spelling of 20112001221102 in words is "twenty trillion, one hundred twelve billion, one million, two hundred twenty-one thousand, one hundred two".