221102211021 has 16 divisors (see below), whose sum is σ = 320580633024. Its totient is φ = 134981316864.

The previous prime is 221102210983. The next prime is 221102211041. The reversal of 221102211021 is 120112201122.

It is not a de Polignac number, because 221102211021 - 2⁷ = 221102210893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221102211041) 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, 58583755 + ... + 58587528.

It is an arithmetic number, because the mean of its divisors is an integer number (20036289564).

Almost surely, 2^221102211021 is an apocalyptic number.

It is an amenable number.

221102211021 is a deficient number, since it is larger than the sum of its proper divisors (99478422003).

221102211021 is a wasteful number, since it uses less digits than its factorization.

221102211021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117171340.

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

Adding to 221102211021 its reverse (120112201122), we get a palindrome (341214412143).

The spelling of 221102211021 in words is "two hundred twenty-one billion, one hundred two million, two hundred eleven thousand, twenty-one".