21110121021120 has 56 divisors (see below), whose sum is σ = 67024634245104. Its totient is φ = 5629365605376.

The previous prime is 21110121021091. The next prime is 21110121021131. The reversal of 21110121021120 is 2112012101112.

It is a happy number.

It is a super-2 number, since 2×21110121021120² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 21110121021120.

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, 10994853739 + ... + 10994855658.

Almost surely, 2^{21110121021120} is an apocalyptic number.

21110121021120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21110121021120 is an abundant number, since it is smaller than the sum of its proper divisors (45914513223984).

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

21110121021120 is a wasteful number, since it uses less digits than its factorization.

21110121021120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21989709417 (or 21989709407 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 21110121021120 its reverse (2112012101112), we get a palindrome (23222133122232).

The spelling of 21110121021120 in words is "twenty-one trillion, one hundred ten billion, one hundred twenty-one million, twenty-one thousand, one hundred twenty".