221102000021 has 8 divisors (see below), whose sum is σ = 252949319040. Its totient is φ = 189320010768.

The previous prime is 221101999999. The next prime is 221102000029. The reversal of 221102000021 is 120000201122.

It is a happy number.

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

It is not a de Polignac number, because 221102000021 - 2⁶ = 221101999957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221101999966 and 221102000011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221102000029) 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, 16325186 + ... + 16338723.

It is an arithmetic number, because the mean of its divisors is an integer number (31618664880).

Almost surely, 2^221102000021 is an apocalyptic number.

It is an amenable number.

221102000021 is a deficient number, since it is larger than the sum of its proper divisors (31847319019).

221102000021 is an equidigital number, since it uses as much as digits as its factorization.

221102000021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32664883.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 221102000021 its reverse (120000201122), we get a palindrome (341102201143).

The spelling of 221102000021 in words is "two hundred twenty-one billion, one hundred two million, twenty-one", and thus it is an aban number.