21110121110012 has 12 divisors (see below), whose sum is σ = 40301140301016. Its totient is φ = 9595509595440.

The previous prime is 21110121109933. The next prime is 21110121110063. The reversal of 21110121110012 is 21001112101112.

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, 239887739843 + ... + 239887739930.

It is an arithmetic number, because the mean of its divisors is an integer number (3358428358418).

Almost surely, 2^{21110121110012} is an apocalyptic number.

21110121110012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21110121110012 is a deficient number, since it is larger than the sum of its proper divisors (19191019191004).

21110121110012 is a wasteful number, since it uses less digits than its factorization.

21110121110012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 479775479788 (or 479775479786 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 21110121110012 its reverse (21001112101112), we get a palindrome (42111233211124).

The spelling of 21110121110012 in words is "twenty-one trillion, one hundred ten billion, one hundred twenty-one million, one hundred ten thousand, twelve".