13021221233 has 4 divisors (see below), whose sum is σ = 13022190960. Its totient is φ = 13020251508.

The previous prime is 13021221229. The next prime is 13021221253. The reversal of 13021221233 is 33212212031.

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: 33212212031 = 178567 ⋅185993.

It is a cyclic number.

It is not a de Polignac number, because 13021221233 - 2² = 13021221229 is a prime.

It is a super-3 number, since 3×13021221233³ (a number of 31 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13021221253) 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, 464435 + ... + 491672.

It is an arithmetic number, because the mean of its divisors is an integer number (3255547740).

Almost surely, 2^13021221233 is an apocalyptic number.

It is an amenable number.

13021221233 is a deficient number, since it is larger than the sum of its proper divisors (969727).

13021221233 is an equidigital number, since it uses as much as digits as its factorization.

13021221233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 969726.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 13021221233 its reverse (33212212031), we get a palindrome (46233433264).

The spelling of 13021221233 in words is "thirteen billion, twenty-one million, two hundred twenty-one thousand, two hundred thirty-three".