11122221001 has 2 divisors, whose sum is σ = 11122221002. Its totient is φ = 11122221000.

The previous prime is 11122220983. The next prime is 11122221023. The reversal of 11122221001 is 10012222111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6328043401 + 4794177600 = 79549^2 + 69240^2 .

It is a cyclic number.

It is not a de Polignac number, because 11122221001 - 2⁹ = 11122220489 is a prime.

It is not a weakly prime, because it can be changed into another prime (11122221041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5561110500 + 5561110501.

It is an arithmetic number, because the mean of its divisors is an integer number (5561110501).

Almost surely, 2^11122221001 is an apocalyptic number.

It is an amenable number.

11122221001 is a deficient number, since it is larger than the sum of its proper divisors (1).

11122221001 is an equidigital number, since it uses as much as digits as its factorization.

11122221001 is an evil number, because the sum of its binary digits is even.

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

Adding to 11122221001 its reverse (10012222111), we get a palindrome (21134443112).

The spelling of 11122221001 in words is "eleven billion, one hundred twenty-two million, two hundred twenty-one thousand, one".