1101221011 has 4 divisors (see below), whose sum is σ = 1201332024. Its totient is φ = 1001110000.

The previous prime is 1101221003. The next prime is 1101221021.

1101221011 is nontrivially palindromic in base 10.

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

It is not a de Polignac number, because 1101221011 - 2³ = 1101221003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1101221021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50055490 + ... + 50055511.

It is an arithmetic number, because the mean of its divisors is an integer number (300333006).

Almost surely, 2^1101221011 is an apocalyptic number.

1101221011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1101221011 is a deficient number, since it is larger than the sum of its proper divisors (100111013).

1101221011 is a wasteful number, since it uses less digits than its factorization.

1101221011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100111012.

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

The square root of 1101221011 is about 33184.6502316960. The cubic root of 1101221011 is about 1032.6619213054.

It can be divided in two parts, 11012 and 21011, that multiplied together give a palindrome (231373132).

The spelling of 1101221011 in words is "one billion, one hundred one million, two hundred twenty-one thousand, eleven".