20012101122 has 64 divisors (see below), whose sum is σ = 43609547520. Its totient is φ = 6085497600.

The previous prime is 20012101117. The next prime is 20012101129. The reversal of 20012101122 is 22110121002.

It is a junction number, because it is equal to n+sod(n) for n = 20012101098 and 20012101107.

It is not an unprimeable number, because it can be changed into a prime (20012101129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3576547 + ... + 3582137.

It is an arithmetic number, because the mean of its divisors is an integer number (681399180).

Almost surely, 2^20012101122 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20012101122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21804773760).

20012101122 is an abundant number, since it is smaller than the sum of its proper divisors (23597446398).

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

20012101122 is a wasteful number, since it uses less digits than its factorization.

20012101122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6139.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 20012101122 its reverse (22110121002), we get a palindrome (42122222124).

The spelling of 20012101122 in words is "twenty billion, twelve million, one hundred one thousand, one hundred twenty-two".