21112111201122 has 28 divisors (see below), whose sum is σ = 47480529926790. Its totient is φ = 7037370399888.

The previous prime is 21112111201099. The next prime is 21112111201141. The reversal of 21112111201122 is 22110211121112.

It is a happy number.

21112111201122 is a `hidden beast` number, since 211 + 1 + 211 + 120 + 1 + 122 = 666.

It can be written as a sum of positive squares in only one way, i.e., 20493810486081 + 618300715041 = 4527009^2 + 786321^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 21112111201095 and 21112111201104.

It is an unprimeable number.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 7240091547 + ... + 7240094462.

Almost surely, 2^{21112111201122} is an apocalyptic number.

21112111201122 is an abundant number, since it is smaller than the sum of its proper divisors (26368418725668).

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

21112111201122 is an equidigital number, since it uses as much as digits as its factorization.

21112111201122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14480186029 (or 14480186014 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 21112111201122 its reverse (22110211121112), we get a palindrome (43222322322234).

The spelling of 21112111201122 in words is "twenty-one trillion, one hundred twelve billion, one hundred eleven million, two hundred one thousand, one hundred twenty-two".