110021021222221 has 4 divisors (see below), whose sum is σ = 110021097516444. Its totient is φ = 110020944928000.

The previous prime is 110021021222153. The next prime is 110021021222279. The reversal of 110021021222221 is 122222120120011.

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 88964982015625 + 21056039206596 = 9432125^2 + 4588686^2 .

It is a cyclic number.

It is not a de Polignac number, because 110021021222221 - 2²⁷ = 110020887004493 is a prime.

It is a super-2 number, since 2×110021021222221² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (110021021228221) 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, 35941510 + ... + 38882311.

It is an arithmetic number, because the mean of its divisors is an integer number (27505274379111).

Almost surely, 2^{110021021222221} is an apocalyptic number.

It is an amenable number.

110021021222221 is a deficient number, since it is larger than the sum of its proper divisors (76294223).

110021021222221 is an equidigital number, since it uses as much as digits as its factorization.

110021021222221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76294222.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 110021021222221 its reverse (122222120120011), we get a palindrome (232243141342232).

The spelling of 110021021222221 in words is "one hundred ten trillion, twenty-one billion, twenty-one million, two hundred twenty-two thousand, two hundred twenty-one".