1101323221 has 4 divisors (see below), whose sum is σ = 1101394944. Its totient is φ = 1101251500.

The previous prime is 1101323213. The next prime is 1101323231. The reversal of 1101323221 is 1223231011.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1101323221 - 2³ = 1101323213 is a prime.

It is a super-2 number, since 2×1101323221² = 2425825674227629682, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1101323195 and 1101323204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1101323231) 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, 2455 + ... + 46996.

It is an arithmetic number, because the mean of its divisors is an integer number (275348736).

Almost surely, 2^1101323221 is an apocalyptic number.

It is an amenable number.

1101323221 is a deficient number, since it is larger than the sum of its proper divisors (71723).

1101323221 is an equidigital number, since it uses as much as digits as its factorization.

1101323221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71722.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1101323221 is about 33186.1902152085. The cubic root of 1101323221 is about 1032.6938692095.

Adding to 1101323221 its reverse (1223231011), we get a palindrome (2324554232).

The spelling of 1101323221 in words is "one billion, one hundred one million, three hundred twenty-three thousand, two hundred twenty-one".