221232112121311 has 4 divisors (see below), whose sum is σ = 221232302320624. Its totient is φ = 221231921922000.

The previous prime is 221232112121299. The next prime is 221232112121393. The reversal of 221232112121311 is 113121211232122.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 221232112121311 - 2¹⁵ = 221232112088543 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 (221232112521311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 93344115 + ... + 95684836.

It is an arithmetic number, because the mean of its divisors is an integer number (55308075580156).

Almost surely, 2^{221232112121311} is an apocalyptic number.

221232112121311 is a deficient number, since it is larger than the sum of its proper divisors (190199313).

221232112121311 is a wasteful number, since it uses less digits than its factorization.

221232112121311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190199312.

The product of its digits is 576, while the sum is 25.

Adding to 221232112121311 its reverse (113121211232122), we get a palindrome (334353323353433).

The spelling of 221232112121311 in words is "two hundred twenty-one trillion, two hundred thirty-two billion, one hundred twelve million, one hundred twenty-one thousand, three hundred eleven".