221020210020101 has 8 divisors (see below), whose sum is σ = 221055294144384. Its totient is φ = 220985128702800.

The previous prime is 221020210020089. The next prime is 221020210020163. The reversal of 221020210020101 is 101020012020122.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221020210020101 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221020210020301) 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, 159685376 + ... + 161063526.

It is an arithmetic number, because the mean of its divisors is an integer number (27631911768048).

Almost surely, 2^{221020210020101} is an apocalyptic number.

It is an amenable number.

221020210020101 is a deficient number, since it is larger than the sum of its proper divisors (35084124283).

221020210020101 is a wasteful number, since it uses less digits than its factorization.

221020210020101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1403491.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 221020210020101 its reverse (101020012020122), we get a palindrome (322040222040223).

The spelling of 221020210020101 in words is "two hundred twenty-one trillion, twenty billion, two hundred ten million, twenty thousand, one hundred one".