221102330021 has 16 divisors (see below), whose sum is σ = 241979244480. Its totient is φ = 201215604480.

The previous prime is 221102330017. The next prime is 221102330039. The reversal of 221102330021 is 120033201122.

It is a cyclic number.

It is not a de Polignac number, because 221102330021 - 2² = 221102330017 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221102330011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1745711 + ... + 1868076.

It is an arithmetic number, because the mean of its divisors is an integer number (15123702780).

Almost surely, 2^221102330021 is an apocalyptic number.

It is an amenable number.

221102330021 is a deficient number, since it is larger than the sum of its proper divisors (20876914459).

221102330021 is a wasteful number, since it uses less digits than its factorization.

221102330021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3613924.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 221102330021 its reverse (120033201122), we get a palindrome (341135531143).

The spelling of 221102330021 in words is "two hundred twenty-one billion, one hundred two million, three hundred thirty thousand, twenty-one".