110000221210021 has 2 divisors, whose sum is σ = 110000221210022. Its totient is φ = 110000221210020.

The previous prime is 110000221210001. The next prime is 110000221210031. The reversal of 110000221210021 is 120012122000011.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67027607587521 + 42972613622500 = 8187039^2 + 6555350^2 .

It is an emirp because it is prime and its reverse (120012122000011) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 110000221210021 - 2²³ = 110000212821413 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 110000221209983 and 110000221210010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (110000221210001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55000110605010 + 55000110605011.

It is an arithmetic number, because the mean of its divisors is an integer number (55000110605011).

Almost surely, 2^{110000221210021} is an apocalyptic number.

It is an amenable number.

110000221210021 is a deficient number, since it is larger than the sum of its proper divisors (1).

110000221210021 is an equidigital number, since it uses as much as digits as its factorization.

110000221210021 is an evil number, because the sum of its binary digits is even.

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

Adding to 110000221210021 its reverse (120012122000011), we get a palindrome (230012343210032).

The spelling of 110000221210021 in words is "one hundred ten trillion, two hundred twenty-one million, two hundred ten thousand, twenty-one".