110000012221021 has 4 divisors (see below), whose sum is σ = 118461551622652. Its totient is φ = 101538472819392.

The previous prime is 110000012221013. The next prime is 110000012221103. The reversal of 110000012221021 is 120122210000011.

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 34424200121796 + 75575812099225 = 5867214^2 + 8693435^2 .

It is a cyclic number.

It is not a de Polignac number, because 110000012221021 - 2³ = 110000012221013 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13), and also a Moran number because the ratio is a prime number: 8461539401617 = 110000012221021 / (1 + 1 + 0 + 0 + 0 + 0 + 0 + 1 + 2 + 2 + 2 + 1 + 0 + 2 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 110000012220992 and 110000012221010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (110000012228021) 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, 4230769700796 + ... + 4230769700821.

It is an arithmetic number, because the mean of its divisors is an integer number (29615387905663).

Almost surely, 2^{110000012221021} is an apocalyptic number.

It is an amenable number.

110000012221021 is a deficient number, since it is larger than the sum of its proper divisors (8461539401631).

110000012221021 is an equidigital number, since it uses as much as digits as its factorization.

110000012221021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8461539401630.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 110000012221021 its reverse (120122210000011), we get a palindrome (230122222221032).

The spelling of 110000012221021 in words is "one hundred ten trillion, twelve million, two hundred twenty-one thousand, twenty-one".