11222000021 has 2 divisors, whose sum is σ = 11222000022. Its totient is φ = 11222000020.

The previous prime is 11221999991. The next prime is 11222000087. The reversal of 11222000021 is 12000022211.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7216502500 + 4005497521 = 84950^2 + 63289^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11222000021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11221999966 and 11222000011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11222000221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5611000010 + 5611000011.

It is an arithmetic number, because the mean of its divisors is an integer number (5611000011).

Almost surely, 2^11222000021 is an apocalyptic number.

It is an amenable number.

11222000021 is a deficient number, since it is larger than the sum of its proper divisors (1).

11222000021 is an equidigital number, since it uses as much as digits as its factorization.

11222000021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 11222000021 its reverse (12000022211), we get a palindrome (23222022232).

The spelling of 11222000021 in words is "eleven billion, two hundred twenty-two million, twenty-one", and thus it is an aban number.