221200021212311 has 16 divisors (see below), whose sum is σ = 222833610735840. Its totient is φ = 219572286796800.

The previous prime is 221200021212173. The next prime is 221200021212341. The reversal of 221200021212311 is 113212120002122.

It is a cyclic number.

It is not a de Polignac number, because 221200021212311 - 2²² = 221200017018007 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 (221200021212341) 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, 3596308220 + ... + 3596369726.

It is an arithmetic number, because the mean of its divisors is an integer number (13927100670990).

Almost surely, 2^{221200021212311} is an apocalyptic number.

221200021212311 is a deficient number, since it is larger than the sum of its proper divisors (1633589523529).

221200021212311 is a wasteful number, since it uses less digits than its factorization.

221200021212311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108674.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 221200021212311 its reverse (113212120002122), we get a palindrome (334412141214433).

The spelling of 221200021212311 in words is "two hundred twenty-one trillion, two hundred billion, twenty-one million, two hundred twelve thousand, three hundred eleven".