110102021221 has 4 divisors (see below), whose sum is σ = 110540674944. Its totient is φ = 109663367500.

The previous prime is 110102021219. The next prime is 110102021257. The reversal of 110102021221 is 122120201011.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 122120201011 = 23 ⋅5309573957.

It is a cyclic number.

It is not a de Polignac number, because 110102021221 - 2¹ = 110102021219 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 (110102021021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 219326485 + ... + 219326986.

It is an arithmetic number, because the mean of its divisors is an integer number (27635168736).

Almost surely, 2^110102021221 is an apocalyptic number.

It is an amenable number.

110102021221 is a deficient number, since it is larger than the sum of its proper divisors (438653723).

110102021221 is an equidigital number, since it uses as much as digits as its factorization.

110102021221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438653722.

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

Adding to 110102021221 its reverse (122120201011), we get a palindrome (232222222232).

The spelling of 110102021221 in words is "one hundred ten billion, one hundred two million, twenty-one thousand, two hundred twenty-one".