110101211221 has 8 divisors (see below), whose sum is σ = 110884206744. Its totient is φ = 109320407040.

The previous prime is 110101211219. The next prime is 110101211237. The reversal of 110101211221 is 122112101011.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 26442012100 + 83659199121 = 162610^2 + 289239^2 .

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 110101211221 - 2¹ = 110101211219 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 (110101211621) 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, 446926 + ... + 648031.

It is an arithmetic number, because the mean of its divisors is an integer number (13860525843).

Almost surely, 2^110101211221 is an apocalyptic number.

It is an amenable number.

110101211221 is a deficient number, since it is larger than the sum of its proper divisors (782995523).

110101211221 is a wasteful number, since it uses less digits than its factorization.

110101211221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1095671.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 110101211221 its reverse (122112101011), we get a palindrome (232213312232).

The spelling of 110101211221 in words is "one hundred ten billion, one hundred one million, two hundred eleven thousand, two hundred twenty-one".