221110220001211 has 4 divisors (see below), whose sum is σ = 234116703530712. Its totient is φ = 208103736471712.

The previous prime is 221110220001199. The next prime is 221110220001221. The reversal of 221110220001211 is 112100022011122.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 221110220001211 - 2⁵ = 221110220001179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221110220001221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6503241764725 + ... + 6503241764758.

It is an arithmetic number, because the mean of its divisors is an integer number (58529175882678).

Almost surely, 2^{221110220001211} is an apocalyptic number.

221110220001211 is a deficient number, since it is larger than the sum of its proper divisors (13006483529501).

221110220001211 is a wasteful number, since it uses less digits than its factorization.

221110220001211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13006483529500.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 221110220001211 its reverse (112100022011122), we get a palindrome (333210242012333).

The spelling of 221110220001211 in words is "two hundred twenty-one trillion, one hundred ten billion, two hundred twenty million, one thousand, two hundred eleven".