221002011101 has 4 divisors (see below), whose sum is σ = 221003079132. Its totient is φ = 221000943072.

The previous prime is 221002011077. The next prime is 221002011121. The reversal of 221002011101 is 101110200122.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 126277176025 + 94724835076 = 355355^2 + 307774^2 .

It is a cyclic number.

It is not a de Polignac number, because 221002011101 - 2¹⁰ = 221002010077 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 (221002011121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 112970 + ... + 674363.

It is an arithmetic number, because the mean of its divisors is an integer number (55250769783).

Almost surely, 2^221002011101 is an apocalyptic number.

It is an amenable number.

221002011101 is a deficient number, since it is larger than the sum of its proper divisors (1068031).

221002011101 is an equidigital number, since it uses as much as digits as its factorization.

221002011101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1068030.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 221002011101 its reverse (101110200122), we get a palindrome (322112211223).

The spelling of 221002011101 in words is "two hundred twenty-one billion, two million, eleven thousand, one hundred one".