221110022121 has 8 divisors (see below), whose sum is σ = 299646369024. Its totient is φ = 144990178320.

The previous prime is 221110022101. The next prime is 221110022123. The reversal of 221110022121 is 121220011122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 221110022121 - 2⁶ = 221110022057 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221110022121.

It is not an unprimeable number, because it can be changed into a prime (221110022123) 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, 604125561 + ... + 604125926.

It is an arithmetic number, because the mean of its divisors is an integer number (37455796128).

Almost surely, 2^221110022121 is an apocalyptic number.

It is an amenable number.

221110022121 is a deficient number, since it is larger than the sum of its proper divisors (78536346903).

221110022121 is a wasteful number, since it uses less digits than its factorization.

221110022121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1208251551.

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

Adding to 221110022121 its reverse (121220011122), we get a palindrome (342330033243).

The spelling of 221110022121 in words is "two hundred twenty-one billion, one hundred ten million, twenty-two thousand, one hundred twenty-one".