221232120113311 has 2 divisors, whose sum is σ = 221232120113312. Its totient is φ = 221232120113310.

The previous prime is 221232120113309. The next prime is 221232120113317. The reversal of 221232120113311 is 113311021232122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221232120113311 - 2¹ = 221232120113309 is a prime.

It is a super-2 number, since 2×221232120113311² (a number of 29 digits) contains 22 as substring.

Together with 221232120113309, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221232120113317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110616060056655 + 110616060056656.

It is an arithmetic number, because the mean of its divisors is an integer number (110616060056656).

Almost surely, 2^{221232120113311} is an apocalyptic number.

221232120113311 is a deficient number, since it is larger than the sum of its proper divisors (1).

221232120113311 is an equidigital number, since it uses as much as digits as its factorization.

221232120113311 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 25.

Adding to 221232120113311 its reverse (113311021232122), we get a palindrome (334543141345433).

The spelling of 221232120113311 in words is "two hundred twenty-one trillion, two hundred thirty-two billion, one hundred twenty million, one hundred thirteen thousand, three hundred eleven".