110100021200021 has 4 divisors (see below), whose sum is σ = 110132092284492. Its totient is φ = 110067950115552.

The previous prime is 110100021199999. The next prime is 110100021200023. The reversal of 110100021200021 is 120002120001011.

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 51711487744900 + 58388533455121 = 7191070^2 + 7641239^2 .

It is a cyclic number.

It is not a de Polignac number, because 110100021200021 - 2⁶ = 110100021199957 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 110100021199975 and 110100021200011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (110100021200023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16035537086 + ... + 16035543951.

It is an arithmetic number, because the mean of its divisors is an integer number (27533023071123).

Almost surely, 2^{110100021200021} is an apocalyptic number.

It is an amenable number.

110100021200021 is a deficient number, since it is larger than the sum of its proper divisors (32071084471).

110100021200021 is an equidigital number, since it uses as much as digits as its factorization.

110100021200021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32071084470.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 110100021200021 its reverse (120002120001011), we get a palindrome (230102141201032).

The spelling of 110100021200021 in words is "one hundred ten trillion, one hundred billion, twenty-one million, two hundred thousand, twenty-one".