110001212221 has 8 divisors (see below), whose sum is σ = 115659840600. Its totient is φ = 104466949440.

The previous prime is 110001212219. The next prime is 110001212249. The reversal of 110001212221 is 122212100011.

It can be written as a sum of positive squares in 4 ways, for example, as 8466576196 + 101534636025 = 92014^2 + 318645^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 110001212221 - 2¹ = 110001212219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (110001212201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31089586 + ... + 31093123.

It is an arithmetic number, because the mean of its divisors is an integer number (14457480075).

Almost surely, 2^110001212221 is an apocalyptic number.

It is an amenable number.

110001212221 is a deficient number, since it is larger than the sum of its proper divisors (5658628379).

110001212221 is an equidigital number, since it uses as much as digits as its factorization.

110001212221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62182799.

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

Adding to 110001212221 its reverse (122212100011), we get a palindrome (232213312232).

It can be divided in two parts, 11000 and 1212221, that added together give a palindrome (1223221).

The spelling of 110001212221 in words is "one hundred ten billion, one million, two hundred twelve thousand, two hundred twenty-one".