20010121021110 has 256 divisors, whose sum is σ = 53134013905920. Its totient is φ = 4782516480000.

The previous prime is 20010121021103. The next prime is 20010121021127. The reversal of 20010121021110 is 1112012101002.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 13402625524 + ... + 13402627016.

It is an arithmetic number, because the mean of its divisors is an integer number (207554741820).

Almost surely, 2^{20010121021110} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20010121021110, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26567006952960).

20010121021110 is an abundant number, since it is smaller than the sum of its proper divisors (33123892884810).

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

20010121021110 is a wasteful number, since it uses less digits than its factorization.

20010121021110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3055.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 20010121021110 its reverse (1112012101002), we get a palindrome (21122133122112).

The spelling of 20010121021110 in words is "twenty trillion, ten billion, one hundred twenty-one million, twenty-one thousand, one hundred ten".