1101221023 has 4 divisors (see below), whose sum is σ = 1258538320. Its totient is φ = 943903728.

The previous prime is 1101221021. The next prime is 1101221039. The reversal of 1101221023 is 3201221011.

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

It is a cyclic number.

It is not a de Polignac number, because 1101221023 - 2¹ = 1101221021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1101220994 and 1101221012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1101221021) 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, 78658638 + ... + 78658651.

It is an arithmetic number, because the mean of its divisors is an integer number (314634580).

Almost surely, 2^1101221023 is an apocalyptic number.

1101221023 is a deficient number, since it is larger than the sum of its proper divisors (157317297).

1101221023 is an equidigital number, since it uses as much as digits as its factorization.

1101221023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157317296.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 1101221023 is about 33184.6504125025. The cubic root of 1101221023 is about 1032.6619250564.

Adding to 1101221023 its reverse (3201221011), we get a palindrome (4302442034).

The spelling of 1101221023 in words is "one billion, one hundred one million, two hundred twenty-one thousand, twenty-three".