11022021001 has 4 divisors (see below), whose sum is σ = 11028674452. Its totient is φ = 11015367552.

The previous prime is 11022020951. The next prime is 11022021013. The reversal of 11022021001 is 10012022011.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3784095225 + 7237925776 = 61515^2 + 85076^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11022021001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11022021041) 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, 3324240 + ... + 3327553.

It is an arithmetic number, because the mean of its divisors is an integer number (2757168613).

Almost surely, 2^11022021001 is an apocalyptic number.

It is an amenable number.

11022021001 is a deficient number, since it is larger than the sum of its proper divisors (6653451).

11022021001 is an equidigital number, since it uses as much as digits as its factorization.

11022021001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6653450.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 11022021001 its reverse (10012022011), we get a palindrome (21034043012).

The spelling of 11022021001 in words is "eleven billion, twenty-two million, twenty-one thousand, one".