11022212021 has 4 divisors (see below), whose sum is σ = 11670577452. Its totient is φ = 10373846592.

The previous prime is 11022211969. The next prime is 11022212039. The reversal of 11022212021 is 12021222011.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12021222011 = 983 ⋅12229117.

It can be written as a sum of positive squares in 2 ways, for example, as 8030668996 + 2991543025 = 89614^2 + 54695^2 .

It is a cyclic number.

It is not a de Polignac number, because 11022212021 - 2¹⁴ = 11022195637 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11022211987 and 11022212005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11022212321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 324182690 + ... + 324182723.

It is an arithmetic number, because the mean of its divisors is an integer number (2917644363).

Almost surely, 2^11022212021 is an apocalyptic number.

It is an amenable number.

11022212021 is a deficient number, since it is larger than the sum of its proper divisors (648365431).

11022212021 is an equidigital number, since it uses as much as digits as its factorization.

11022212021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 648365430.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 11022212021 its reverse (12021222011), we get a palindrome (23043434032).

The spelling of 11022212021 in words is "eleven billion, twenty-two million, two hundred twelve thousand, twenty-one".