221110212122011 has 16 divisors (see below), whose sum is σ = 233210890281600. Its totient is φ = 209056239360000.

The previous prime is 221110212122003. The next prime is 221110212122029. The reversal of 221110212122011 is 110221212011122.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 221110212122011 - 2³ = 221110212122003 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

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 221110212122011.

It is not an unprimeable number, because it can be changed into a prime (221110212122911) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15985836 + ... + 26415286.

It is an arithmetic number, because the mean of its divisors is an integer number (14575680642600).

Almost surely, 2^{221110212122011} is an apocalyptic number.

221110212122011 is a deficient number, since it is larger than the sum of its proper divisors (12100678159589).

221110212122011 is a wasteful number, since it uses less digits than its factorization.

221110212122011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10431690.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 221110212122011 its reverse (110221212011122), we get a palindrome (331331424133133).

The spelling of 221110212122011 in words is "two hundred twenty-one trillion, one hundred ten billion, two hundred twelve million, one hundred twenty-two thousand, eleven".