221110121021 has 8 divisors (see below), whose sum is σ = 226523606400. Its totient is φ = 215697614560.

The previous prime is 221110120969. The next prime is 221110121033. The reversal of 221110121021 is 120121011122.

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 221110121021 - 2¹⁴ = 221110104637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221110120987 and 221110121005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221110021021) 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, 223370 + ... + 701508.

It is an arithmetic number, because the mean of its divisors is an integer number (28315450800).

Almost surely, 2^221110121021 is an apocalyptic number.

It is an amenable number.

221110121021 is a deficient number, since it is larger than the sum of its proper divisors (5413485379).

221110121021 is a wasteful number, since it uses less digits than its factorization.

221110121021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 489459.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 221110121021 its reverse (120121011122), we get a palindrome (341231132143).

The spelling of 221110121021 in words is "two hundred twenty-one billion, one hundred ten million, one hundred twenty-one thousand, twenty-one".