1101011221 has 16 divisors (see below), whose sum is σ = 1200015360. Its totient is φ = 1006320240.

The previous prime is 1101011147. The next prime is 1101011227. The reversal of 1101011221 is 1221101011.

It is a cyclic number.

It is not a de Polignac number, because 1101011221 - 2²⁹ = 564140309 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1101011198 and 1101011207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1101011227) 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, 201690 + ... + 207076.

It is an arithmetic number, because the mean of its divisors is an integer number (75000960).

Almost surely, 2^1101011221 is an apocalyptic number.

It is an amenable number.

1101011221 is a deficient number, since it is larger than the sum of its proper divisors (99004139).

1101011221 is a wasteful number, since it uses less digits than its factorization.

1101011221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5784.

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

The square root of 1101011221 is about 33181.4891317433. The cubic root of 1101011221 is about 1032.5963407964.

Adding to 1101011221 its reverse (1221101011), we get a palindrome (2322112232).

The spelling of 1101011221 in words is "one billion, one hundred one million, eleven thousand, two hundred twenty-one".