22021211011 has 4 divisors (see below), whose sum is σ = 22978654992. Its totient is φ = 21063767032.

The previous prime is 22021210979. The next prime is 22021211029. The reversal of 22021211011 is 11011212022.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11011212022 = 2 ⋅5505606011.

It is a cyclic number.

It is not a de Polignac number, because 22021211011 - 2⁵ = 22021210979 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22021210982 and 22021211000.

It is not an unprimeable number, because it can be changed into a prime (22021211911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 478721956 + ... + 478722001.

It is an arithmetic number, because the mean of its divisors is an integer number (5744663748).

Almost surely, 2^22021211011 is an apocalyptic number.

22021211011 is a deficient number, since it is larger than the sum of its proper divisors (957443981).

22021211011 is an equidigital number, since it uses as much as digits as its factorization.

22021211011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 957443980.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 22021211011 its reverse (11011212022), we get a palindrome (33032423033).

The spelling of 22021211011 in words is "twenty-two billion, twenty-one million, two hundred eleven thousand, eleven".