110001021222221 has 4 divisors (see below), whose sum is σ = 112076512188732. Its totient is φ = 107925530255712.

The previous prime is 110001021222173. The next prime is 110001021222271. The reversal of 110001021222221 is 122222120100011.

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 39526507314121 + 70474513908100 = 6287011^2 + 8394910^2 .

It is a cyclic number.

It is not a de Polignac number, because 110001021222221 - 2³⁸ = 109726143315277 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 110001021222221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (110001021222271) 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, 1037745483176 + ... + 1037745483281.

It is an arithmetic number, because the mean of its divisors is an integer number (28019128047183).

Almost surely, 2^{110001021222221} is an apocalyptic number.

It is an amenable number.

110001021222221 is a deficient number, since it is larger than the sum of its proper divisors (2075490966511).

110001021222221 is an equidigital number, since it uses as much as digits as its factorization.

110001021222221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2075490966510.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 110001021222221 its reverse (122222120100011), we get a palindrome (232223141322232).

The spelling of 110001021222221 in words is "one hundred ten trillion, one billion, twenty-one million, two hundred twenty-two thousand, two hundred twenty-one".