221331223133 has 4 divisors (see below), whose sum is σ = 221340437568. Its totient is φ = 221322008700.

The previous prime is 221331223129. The next prime is 221331223153. The reversal of 221331223133 is 331322133122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 331322133122 = 2 ⋅165661066561.

It is a cyclic number.

It is not a de Polignac number, because 221331223133 - 2² = 221331223129 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 (221331223103) 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, 4571093 + ... + 4619258.

It is an arithmetic number, because the mean of its divisors is an integer number (55335109392).

Almost surely, 2^221331223133 is an apocalyptic number.

It is an amenable number.

221331223133 is a deficient number, since it is larger than the sum of its proper divisors (9214435).

221331223133 is an equidigital number, since it uses as much as digits as its factorization.

221331223133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9214434.

The product of its digits is 3888, while the sum is 26.

Adding to 221331223133 its reverse (331322133122), we get a palindrome (552653356255).

The spelling of 221331223133 in words is "two hundred twenty-one billion, three hundred thirty-one million, two hundred twenty-three thousand, one hundred thirty-three".