221213222311 has 2 divisors, whose sum is σ = 221213222312. Its totient is φ = 221213222310.

The previous prime is 221213222297. The next prime is 221213222411. The reversal of 221213222311 is 113222312122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221213222311 - 2¹⁵ = 221213189543 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221213222411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110606611155 + 110606611156.

It is an arithmetic number, because the mean of its divisors is an integer number (110606611156).

Almost surely, 2^221213222311 is an apocalyptic number.

221213222311 is a deficient number, since it is larger than the sum of its proper divisors (1).

221213222311 is an equidigital number, since it uses as much as digits as its factorization.

221213222311 is an evil number, because the sum of its binary digits is even.

The product of its digits is 576, while the sum is 22.

Adding to 221213222311 its reverse (113222312122), we get a palindrome (334435534433).

The spelling of 221213222311 in words is "two hundred twenty-one billion, two hundred thirteen million, two hundred twenty-two thousand, three hundred eleven".