110020012000021 has 4 divisors (see below), whose sum is σ = 110021214588012. Its totient is φ = 110018809412032.

The previous prime is 110020011999983. The next prime is 110020012000123. The reversal of 110020012000021 is 120000210020011.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 99998900003025 + 10021111996996 = 9999945^2 + 3165614^2 .

It is a cyclic number.

It is not a de Polignac number, because 110020012000021 - 2⁹ = 110020011999509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 110020011999971 and 110020012000007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (110020012000721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 601156756 + ... + 601339741.

It is an arithmetic number, because the mean of its divisors is an integer number (27505303647003).

Almost surely, 2^{110020012000021} is an apocalyptic number.

It is an amenable number.

110020012000021 is a deficient number, since it is larger than the sum of its proper divisors (1202587991).

110020012000021 is an equidigital number, since it uses as much as digits as its factorization.

110020012000021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1202587990.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 110020012000021 its reverse (120000210020011), we get a palindrome (230020222020032).

The spelling of 110020012000021 in words is "one hundred ten trillion, twenty billion, twelve million, twenty-one", and thus it is an aban number.