21110121112 has 16 divisors (see below), whose sum is σ = 39685919400. Its totient is φ = 10527209280.

The previous prime is 21110121101. The next prime is 21110121139. The reversal of 21110121112 is 21112101112.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21110121092 and 21110121101.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3478189 + ... + 3484252.

Almost surely, 2^21110121112 is an apocalyptic number.

It is an amenable number.

21110121112 is a deficient number, since it is larger than the sum of its proper divisors (18575798288).

21110121112 is a wasteful number, since it uses less digits than its factorization.

21110121112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6962826 (or 6962822 counting only the distinct ones).

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

Adding to 21110121112 its reverse (21112101112), we get a palindrome (42222222224).

The spelling of 21110121112 in words is "twenty-one billion, one hundred ten million, one hundred twenty-one thousand, one hundred twelve".