110221221021 has 4 divisors (see below), whose sum is σ = 146961628032. Its totient is φ = 73480814012.

The previous prime is 110221220999. The next prime is 110221221031. The reversal of 110221221021 is 120122122011.

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.

It is a cyclic number.

It is not a de Polignac number, because 110221221021 - 2²¹ = 110219123869 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (110221221031) 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, 18370203501 + ... + 18370203506.

It is an arithmetic number, because the mean of its divisors is an integer number (36740407008).

Almost surely, 2^110221221021 is an apocalyptic number.

It is an amenable number.

110221221021 is a deficient number, since it is larger than the sum of its proper divisors (36740407011).

110221221021 is an equidigital number, since it uses as much as digits as its factorization.

110221221021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36740407010.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 110221221021 its reverse (120122122011), we get a palindrome (230343343032).

The spelling of 110221221021 in words is "one hundred ten billion, two hundred twenty-one million, two hundred twenty-one thousand, twenty-one".