221423121233 has 4 divisors (see below), whose sum is σ = 226134251520. Its totient is φ = 216711990948.

The previous prime is 221423121097. The next prime is 221423121239. The reversal of 221423121233 is 332121324122.

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.

It is a cyclic number.

It is not a de Polignac number, because 221423121233 - 2¹² = 221423117137 is a prime.

It is a super-3 number, since 3×221423121233³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221423121239) 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, 2355565073 + ... + 2355565166.

It is an arithmetic number, because the mean of its divisors is an integer number (56533562880).

Almost surely, 2^221423121233 is an apocalyptic number.

It is an amenable number.

221423121233 is a deficient number, since it is larger than the sum of its proper divisors (4711130287).

221423121233 is an equidigital number, since it uses as much as digits as its factorization.

221423121233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4711130286.

The product of its digits is 3456, while the sum is 26.

Adding to 221423121233 its reverse (332121324122), we get a palindrome (553544445355).

The spelling of 221423121233 in words is "two hundred twenty-one billion, four hundred twenty-three million, one hundred twenty-one thousand, two hundred thirty-three".