221000023133 has 4 divisors (see below), whose sum is σ = 221859945660. Its totient is φ = 220140100608.

The previous prime is 221000023117. The next prime is 221000023151. The reversal of 221000023133 is 331320000122.

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

It can be written as a sum of positive squares in 2 ways, for example, as 149538436804 + 71461586329 = 386702^2 + 267323^2 .

It is a cyclic number.

It is not a de Polignac number, because 221000023133 - 2⁴ = 221000023117 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 (221000023183) 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, 429960878 + ... + 429961391.

It is an arithmetic number, because the mean of its divisors is an integer number (55464986415).

Almost surely, 2^221000023133 is an apocalyptic number.

It is an amenable number.

221000023133 is a deficient number, since it is larger than the sum of its proper divisors (859922527).

221000023133 is an equidigital number, since it uses as much as digits as its factorization.

221000023133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 859922526.

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 221000023133 its reverse (331320000122), we get a palindrome (552320023255).

The spelling of 221000023133 in words is "two hundred twenty-one billion, twenty-three thousand, one hundred thirty-three".