1101221112 has 64 divisors (see below), whose sum is σ = 2803939200. Its totient is φ = 360328320.

The previous prime is 1101221111. The next prime is 1101221113. The reversal of 1101221112 is 2111221011.

It is an interprime number because it is at equal distance from previous prime (1101221111) and next prime (1101221113).

It is a Harshad number since it is a multiple of its sum of digits (12).

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 15 ways as a sum of consecutive naturals, for example, 531214 + ... + 533282.

It is an arithmetic number, because the mean of its divisors is an integer number (43811550).

Almost surely, 2^1101221112 is an apocalyptic number.

1101221112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1101221112 is an abundant number, since it is smaller than the sum of its proper divisors (1702718088).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1101221112 is a wasteful number, since it uses less digits than its factorization.

1101221112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2476 (or 2472 counting only the distinct ones).

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

The square root of 1101221112 is about 33184.6517534839. The cubic root of 1101221112 is about 1032.6619528761.

Adding to 1101221112 its reverse (2111221011), we get a palindrome (3212442123).

The spelling of 1101221112 in words is "one billion, one hundred one million, two hundred twenty-one thousand, one hundred twelve".