221234332331 has 4 divisors (see below), whose sum is σ = 221239871664. Its totient is φ = 221228793000.

The previous prime is 221234332303. The next prime is 221234332337. The reversal of 221234332331 is 133233432122.

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 221234332331 - 2²⁶ = 221167223467 is a prime.

It is a super-2 number, since 2×221234332331² (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 = 221234332294 and 221234332303.

It is not an unprimeable number, because it can be changed into a prime (221234332337) 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, 2709320 + ... + 2789781.

It is an arithmetic number, because the mean of its divisors is an integer number (55309967916).

Almost surely, 2^221234332331 is an apocalyptic number.

221234332331 is a deficient number, since it is larger than the sum of its proper divisors (5539333).

221234332331 is an equidigital number, since it uses as much as digits as its factorization.

221234332331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5539332.

The product of its digits is 15552, while the sum is 29.

Adding to 221234332331 its reverse (133233432122), we get a palindrome (354467764453).

The spelling of 221234332331 in words is "two hundred twenty-one billion, two hundred thirty-four million, three hundred thirty-two thousand, three hundred thirty-one".