221233221331 has 4 divisors (see below), whose sum is σ = 221234167312. Its totient is φ = 221232275352.

The previous prime is 221233221311. The next prime is 221233221343. The reversal of 221233221331 is 133122332122.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 221233221331 - 2⁷ = 221233221203 is a prime.

It is a super-2 number, since 2×221233221331² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221233221296 and 221233221305.

It is not an unprimeable number, because it can be changed into a prime (221233221311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 161701 + ... + 684553.

It is an arithmetic number, because the mean of its divisors is an integer number (55308541828).

Almost surely, 2^221233221331 is an apocalyptic number.

221233221331 is a deficient number, since it is larger than the sum of its proper divisors (945981).

221233221331 is an equidigital number, since it uses as much as digits as its factorization.

221233221331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 945980.

The product of its digits is 2592, while the sum is 25.

Adding to 221233221331 its reverse (133122332122), we get a palindrome (354355553453).

The spelling of 221233221331 in words is "two hundred twenty-one billion, two hundred thirty-three million, two hundred twenty-one thousand, three hundred thirty-one".