1101221221 has 8 divisors (see below), whose sum is σ = 1104711680. Its totient is φ = 1097737488.

The previous prime is 1101221197. The next prime is 1101221311. The reversal of 1101221221 is 1221221011.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1101221221 - 2¹¹ = 1101219173 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 (1101221021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 658975 + ... + 660643.

It is an arithmetic number, because the mean of its divisors is an integer number (138088960).

Almost surely, 2^1101221221 is an apocalyptic number.

It is an amenable number.

1101221221 is a deficient number, since it is larger than the sum of its proper divisors (3490459).

1101221221 is a wasteful number, since it uses less digits than its factorization.

1101221221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3363.

The product of its (nonzero) digits is 16, while the sum is 13.

The square root of 1101221221 is about 33184.6533958093. The cubic root of 1101221221 is about 1032.6619869474.

Adding to 1101221221 its reverse (1221221011), we get a palindrome (2322442232).

The spelling of 1101221221 in words is "one billion, one hundred one million, two hundred twenty-one thousand, two hundred twenty-one".