11021021121 has 32 divisors (see below), whose sum is σ = 16384757760. Its totient is φ = 6533432000.

The previous prime is 11021021083. The next prime is 11021021129. The reversal of 11021021121 is 12112012011.

It is a cyclic number.

It is not a de Polignac number, because 11021021121 - 2¹⁰ = 11021020097 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11021021097 and 11021021106.

It is not an unprimeable number, because it can be changed into a prime (11021021129) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 256720 + ... + 296558.

It is an arithmetic number, because the mean of its divisors is an integer number (512023680).

Almost surely, 2^11021021121 is an apocalyptic number.

11021021121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11021021121 is a deficient number, since it is larger than the sum of its proper divisors (5363736639).

11021021121 is a wasteful number, since it uses less digits than its factorization.

11021021121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40037.

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

Adding to 11021021121 its reverse (12112012011), we get a palindrome (23133033132).

The spelling of 11021021121 in words is "eleven billion, twenty-one million, twenty-one thousand, one hundred twenty-one".