11021121 has 12 divisors (see below), whose sum is σ = 16757520. Its totient is φ = 6960600.

The previous prime is 11021119. The next prime is 11021123. The reversal of 11021121 is 12112011.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (11021119) and next prime (11021123).

It is not a de Polignac number, because 11021121 - 2¹ = 11021119 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11021123) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32055 + ... + 32396.

It is an arithmetic number, because the mean of its divisors is an integer number (1396460).

Almost surely, 2^11021121 is an apocalyptic number.

It is an amenable number.

11021121 is a deficient number, since it is larger than the sum of its proper divisors (5736399).

11021121 is a wasteful number, since it uses less digits than its factorization.

11021121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64476 (or 64473 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

The square root of 11021121 is about 3319.8073739300. The cubic root of 11021121 is about 222.5402595163.

Adding to 11021121 its reverse (12112011), we get a palindrome (23133132).

The spelling of 11021121 in words is "eleven million, twenty-one thousand, one hundred twenty-one".