110221220220121 has 4 divisors (see below), whose sum is σ = 110222081229492. Its totient is φ = 110220359210752.

The previous prime is 110221220220119. The next prime is 110221220220149. The reversal of 110221220220121 is 121022022122011.

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 57883794259600 + 52337425960521 = 7608140^2 + 7234461^2 .

It is a cyclic number.

It is not a de Polignac number, because 110221220220121 - 2¹ = 110221220220119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (110221220220101) 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, 430312636 + ... + 430568701.

It is an arithmetic number, because the mean of its divisors is an integer number (27555520307373).

Almost surely, 2^{110221220220121} is an apocalyptic number.

It is an amenable number.

110221220220121 is a deficient number, since it is larger than the sum of its proper divisors (861009371).

110221220220121 is an equidigital number, since it uses as much as digits as its factorization.

110221220220121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 861009370.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 110221220220121 its reverse (121022022122011), we get a palindrome (231243242342132).

The spelling of 110221220220121 in words is "one hundred ten trillion, two hundred twenty-one billion, two hundred twenty million, two hundred twenty thousand, one hundred twenty-one".