1101221101 has 4 divisors (see below), whose sum is σ = 1111912672. Its totient is φ = 1090529532.

The previous prime is 1101221039. The next prime is 1101221111. The reversal of 1101221101 is 1011221011.

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 1101221101 - 2¹³ = 1101212909 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 (1101221111) 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, 5345631 + ... + 5345836.

It is an arithmetic number, because the mean of its divisors is an integer number (277978168).

Almost surely, 2^1101221101 is an apocalyptic number.

It is an amenable number.

1101221101 is a deficient number, since it is larger than the sum of its proper divisors (10691571).

1101221101 is a wasteful number, since it uses less digits than its factorization.

1101221101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10691570.

The product of its (nonzero) digits is 4, while the sum is 10.

The square root of 1101221101 is about 33184.6515877446. The cubic root of 1101221101 is about 1032.6619494377.

Adding to 1101221101 its reverse (1011221011), we get a palindrome (2112442112).

The spelling of 1101221101 in words is "one billion, one hundred one million, two hundred twenty-one thousand, one hundred one".