20110121020110 has 128 divisors (see below), whose sum is σ = 53178037014528. Its totient is φ = 4826478080000.

The previous prime is 20110121020103. The next prime is 20110121020169. The reversal of 20110121020110 is 1102012101102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 521495230 + ... + 521533790.

It is an arithmetic number, because the mean of its divisors is an integer number (415453414176).

Almost surely, 2^{20110121020110} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20110121020110, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26589018507264).

20110121020110 is an abundant number, since it is smaller than the sum of its proper divisors (33067915994418).

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

20110121020110 is a wasteful number, since it uses less digits than its factorization.

20110121020110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54330.

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

Adding to 20110121020110 its reverse (1102012101102), we get a palindrome (21212133121212).

The spelling of 20110121020110 in words is "twenty trillion, one hundred ten billion, one hundred twenty-one million, twenty thousand, one hundred ten".