1101221211 has 16 divisors (see below), whose sum is σ = 1489052160. Its totient is φ = 723796320.

The previous prime is 1101221197. The next prime is 1101221311. The reversal of 1101221211 is 1121221011.

It is not a de Polignac number, because 1101221211 - 2¹³ = 1101213019 is a prime.

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 15 ways as a sum of consecutive naturals, for example, 180196 + ... + 186206.

It is an arithmetic number, because the mean of its divisors is an integer number (93065760).

Almost surely, 2^1101221211 is an apocalyptic number.

1101221211 is a deficient number, since it is larger than the sum of its proper divisors (387830949).

1101221211 is an equidigital number, since it uses as much as digits as its factorization.

1101221211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6866.

The product of its (nonzero) digits is 8, while the sum is 12.

The square root of 1101221211 is about 33184.6532451373. The cubic root of 1101221211 is about 1032.6619838216.

Adding to 1101221211 its reverse (1121221011), we get a palindrome (2222442222).

It can be divided in two parts, 11012 and 21211, that added together give a palindrome (32223).

The spelling of 1101221211 in words is "one billion, one hundred one million, two hundred twenty-one thousand, two hundred eleven".