221110100110121 has 4 divisors (see below), whose sum is σ = 221110261286544. Its totient is φ = 221109938933700.

The previous prime is 221110100110117. The next prime is 221110100110129. The reversal of 221110100110121 is 121011001011122.

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 221110100110121 - 2² = 221110100110117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221110100110096 and 221110100110105.

It is not an unprimeable number, because it can be changed into a prime (221110100110129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78512615 + ... + 81280076.

It is an arithmetic number, because the mean of its divisors is an integer number (55277565321636).

Almost surely, 2^{221110100110121} is an apocalyptic number.

It is an amenable number.

221110100110121 is a deficient number, since it is larger than the sum of its proper divisors (161176423).

221110100110121 is a wasteful number, since it uses less digits than its factorization.

221110100110121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161176422.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 221110100110121 its reverse (121011001011122), we get a palindrome (342121101121243).

It can be divided in two parts, 2211101001 and 10121, that added together give a palindrome (2211111122).

The spelling of 221110100110121 in words is "two hundred twenty-one trillion, one hundred ten billion, one hundred million, one hundred ten thousand, one hundred twenty-one".