110121200100021 has 16 divisors (see below), whose sum is σ = 160178653628928. Its totient is φ = 66739136866800.

The previous prime is 110121200100019. The next prime is 110121200100089. The reversal of 110121200100021 is 120001002121011.

It is not a de Polignac number, because 110121200100021 - 2¹ = 110121200100019 is a prime.

It is a super-2 number, since 2×110121200100021² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (110121200300021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22335801 + ... + 26816606.

It is an arithmetic number, because the mean of its divisors is an integer number (10011165851808).

Almost surely, 2^{110121200100021} is an apocalyptic number.

110121200100021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

110121200100021 is a deficient number, since it is larger than the sum of its proper divisors (50057453528907).

110121200100021 is a wasteful number, since it uses less digits than its factorization.

110121200100021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49220312.

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

Adding to 110121200100021 its reverse (120001002121011), we get a palindrome (230122202221032).

The spelling of 110121200100021 in words is "one hundred ten trillion, one hundred twenty-one billion, two hundred million, one hundred thousand, twenty-one".