210001111122 has 128 divisors (see below), whose sum is σ = 477219817728. Its totient is φ = 61046784000.

The previous prime is 210001111097. The next prime is 210001111157. The reversal of 210001111122 is 221111100012.

It is a junction number, because it is equal to n+sod(n) for n = 210001111098 and 210001111107.

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, 63385338 + ... + 63388650.

It is an arithmetic number, because the mean of its divisors is an integer number (3728279826).

Almost surely, 2^210001111122 is an apocalyptic number.

210001111122 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 210001111122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (238609908864).

210001111122 is an abundant number, since it is smaller than the sum of its proper divisors (267218706606).

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

210001111122 is a wasteful number, since it uses less digits than its factorization.

210001111122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3724.

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

Adding to 210001111122 its reverse (221111100012), we get a palindrome (431112211134).

It can be divided in two parts, 210001 and 111122, that added together give a palindrome (321123).

The spelling of 210001111122 in words is "two hundred ten billion, one million, one hundred eleven thousand, one hundred twenty-two".