221021110220201 has 8 divisors (see below), whose sum is σ = 221078421045504. Its totient is φ = 220963800476800.

The previous prime is 221021110220107. The next prime is 221021110220231. The reversal of 221021110220201 is 102022011120122.

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-221021110220201 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221021110220201.

It is not an unprimeable number, because it can be changed into a prime (221021110220231) 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, 554373536 + ... + 554772078.

It is an arithmetic number, because the mean of its divisors is an integer number (27634802630688).

Almost surely, 2^{221021110220201} is an apocalyptic number.

It is an amenable number.

221021110220201 is a deficient number, since it is larger than the sum of its proper divisors (57310825303).

221021110220201 is a wasteful number, since it uses less digits than its factorization.

221021110220201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 540951.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 221021110220201 its reverse (102022011120122), we get a palindrome (323043121340323).

The spelling of 221021110220201 in words is "two hundred twenty-one trillion, twenty-one billion, one hundred ten million, two hundred twenty thousand, two hundred one".