11023221121 has 12 divisors (see below), whose sum is σ = 12227607700. Its totient is φ = 9929161440.

The previous prime is 11023221101. The next prime is 11023221133. The reversal of 11023221121 is 12112232011.

It can be written as a sum of positive squares in 2 ways, for example, as 7361640000 + 3661581121 = 85800^2 + 60511^2 .

It is not a de Polignac number, because 11023221121 - 2⁷ = 11023220993 is a prime.

It is a super-2 number, since 2×11023221121² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11023221095 and 11023221104.

It is not an unprimeable number, because it can be changed into a prime (11023221101) 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, 404706 + ... + 431083.

Almost surely, 2^11023221121 is an apocalyptic number.

11023221121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11023221121 is a deficient number, since it is larger than the sum of its proper divisors (1204386579).

11023221121 is a wasteful number, since it uses less digits than its factorization.

11023221121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 835920 (or 835909 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 11023221121 its reverse (12112232011), we get a palindrome (23135453132).

It can be divided in two parts, 1102 and 3221121, that added together give a palindrome (3222223).

The spelling of 11023221121 in words is "eleven billion, twenty-three million, two hundred twenty-one thousand, one hundred twenty-one".