11123220001 has 2 divisors, whose sum is σ = 11123220002. Its totient is φ = 11123220000.

The previous prime is 11123219999. The next prime is 11123220013. The reversal of 11123220001 is 10002232111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11025210001 + 98010000 = 105001^2 + 9900^2 .

It is a cyclic number.

It is not a de Polignac number, because 11123220001 - 2¹ = 11123219999 is a prime.

Together with 11123219999, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (11123220301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5561610000 + 5561610001.

It is an arithmetic number, because the mean of its divisors is an integer number (5561610001).

Almost surely, 2^11123220001 is an apocalyptic number.

It is an amenable number.

11123220001 is a deficient number, since it is larger than the sum of its proper divisors (1).

11123220001 is an equidigital number, since it uses as much as digits as its factorization.

11123220001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 11123220001 its reverse (10002232111), we get a palindrome (21125452112).

The spelling of 11123220001 in words is "eleven billion, one hundred twenty-three million, two hundred twenty thousand, one".