221000021101 has 8 divisors (see below), whose sum is σ = 223649942264. Its totient is φ = 218357683200.

The previous prime is 221000021093. The next prime is 221000021111. The reversal of 221000021101 is 101120000122.

221000021101 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 66590318601 + 154409702500 = 258051^2 + 392950^2 .

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 221000021101 - 2³ = 221000021093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221000021111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1837170 + ... + 1953763.

It is an arithmetic number, because the mean of its divisors is an integer number (27956242783).

Almost surely, 2^221000021101 is an apocalyptic number.

It is an amenable number.

221000021101 is a deficient number, since it is larger than the sum of its proper divisors (2649921163).

221000021101 is an equidigital number, since it uses as much as digits as its factorization.

221000021101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3791631.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 221000021101 its reverse (101120000122), we get a palindrome (322120021223).

It can be divided in two parts, 221000021 and 101, that added together give a palindrome (221000122).

The spelling of 221000021101 in words is "two hundred twenty-one billion, twenty-one thousand, one hundred one".