110121022212221 has 2 divisors, whose sum is σ = 110121022212222. Its totient is φ = 110121022212220.

The previous prime is 110121022212161. The next prime is 110121022212283. The reversal of 110121022212221 is 122212220121011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 80729596051225 + 29391426160996 = 8984965^2 + 5421386^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-110121022212221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 110121022212193 and 110121022212202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (110121022212121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55060511106110 + 55060511106111.

It is an arithmetic number, because the mean of its divisors is an integer number (55060511106111).

Almost surely, 2^{110121022212221} is an apocalyptic number.

It is an amenable number.

110121022212221 is a deficient number, since it is larger than the sum of its proper divisors (1).

110121022212221 is an equidigital number, since it uses as much as digits as its factorization.

110121022212221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 110121022212221 its reverse (122212220121011), we get a palindrome (232333242333232).

The spelling of 110121022212221 in words is "one hundred ten trillion, one hundred twenty-one billion, twenty-two million, two hundred twelve thousand, two hundred twenty-one".