221020011101 has 8 divisors (see below), whose sum is σ = 222420971520. Its totient is φ = 219623342512.

The previous prime is 221020011089. The next prime is 221020011109. The reversal of 221020011101 is 101110020122.

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 221020011101 - 2¹⁰ = 221020010077 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 (221020011109) 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 7 ways as a sum of consecutive naturals, for example, 969605 + ... + 1175658.

It is an arithmetic number, because the mean of its divisors is an integer number (27802621440).

Almost surely, 2^221020011101 is an apocalyptic number.

It is an amenable number.

221020011101 is a deficient number, since it is larger than the sum of its proper divisors (1400960419).

221020011101 is a wasteful number, since it uses less digits than its factorization.

221020011101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2145915.

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

Adding to 221020011101 its reverse (101110020122), we get a palindrome (322130031223).

The spelling of 221020011101 in words is "two hundred twenty-one billion, twenty million, eleven thousand, one hundred one".