20110121010112 has 56 divisors (see below), whose sum is σ = 45613822558304. Its totient is φ = 8617311608832.

The previous prime is 20110121010073. The next prime is 20110121010137. The reversal of 20110121010112 is 21101012101102.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (56).

It is a junction number, because it is equal to n+sod(n) for n = 20110121010092 and 20110121010101.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 466053 + ... + 6359044.

It is an arithmetic number, because the mean of its divisors is an integer number (814532545684).

Almost surely, 2^{20110121010112} is an apocalyptic number.

It is an amenable number.

20110121010112 is an abundant number, since it is smaller than the sum of its proper divisors (25503701548192).

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

20110121010112 is an equidigital number, since it uses as much as digits as its factorization.

20110121010112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6831693 (or 6831683 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 20110121010112 its reverse (21101012101102), we get a palindrome (41211133111214).

The spelling of 20110121010112 in words is "twenty trillion, one hundred ten billion, one hundred twenty-one million, ten thousand, one hundred twelve".