221213111311011 has 16 divisors (see below), whose sum is σ = 301577818588416. Its totient is φ = 144181570487136.

The previous prime is 221213111311009. The next prime is 221213111311057. The reversal of 221213111311011 is 110113111312122.

It is not a de Polignac number, because 221213111311011 - 2¹ = 221213111311009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221213111313011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2458042335 + ... + 2458132328.

It is an arithmetic number, because the mean of its divisors is an integer number (18848613661776).

Almost surely, 2^{221213111311011} is an apocalyptic number.

221213111311011 is a deficient number, since it is larger than the sum of its proper divisors (80364707277405).

221213111311011 is a wasteful number, since it uses less digits than its factorization.

221213111311011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4916175002.

The product of its (nonzero) digits is 72, while the sum is 21.

Adding to 221213111311011 its reverse (110113111312122), we get a palindrome (331326222623133).

The spelling of 221213111311011 in words is "two hundred twenty-one trillion, two hundred thirteen billion, one hundred eleven million, three hundred eleven thousand, eleven".