11001122021 has 4 divisors (see below), whose sum is σ = 11256962112. Its totient is φ = 10745281932.

The previous prime is 11001121979. The next prime is 11001122029. The reversal of 11001122021 is 12022110011.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11001122021 - 2¹⁰ = 11001120997 is a prime.

It is a super-2 number, since 2×11001122021² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11001121993 and 11001122011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11001122029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 127919981 + ... + 127920066.

It is an arithmetic number, because the mean of its divisors is an integer number (2814240528).

Almost surely, 2^11001122021 is an apocalyptic number.

It is an amenable number.

11001122021 is a deficient number, since it is larger than the sum of its proper divisors (255840091).

11001122021 is an equidigital number, since it uses as much as digits as its factorization.

11001122021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255840090.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 11001122021 its reverse (12022110011), we get a palindrome (23023232032).

The spelling of 11001122021 in words is "eleven billion, one million, one hundred twenty-two thousand, twenty-one".