11220112001 has 4 divisors (see below), whose sum is σ = 12822985152. Its totient is φ = 9617238852.

The previous prime is 11220111997. The next prime is 11220112021. The reversal of 11220112001 is 10021102211.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 10021102211 = 30839 ⋅324949.

It is a cyclic number.

It is not a de Polignac number, because 11220112001 - 2² = 11220111997 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11220112021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 801436565 + ... + 801436578.

It is an arithmetic number, because the mean of its divisors is an integer number (3205746288).

Almost surely, 2^11220112001 is an apocalyptic number.

It is an amenable number.

11220112001 is a deficient number, since it is larger than the sum of its proper divisors (1602873151).

11220112001 is an equidigital number, since it uses as much as digits as its factorization.

11220112001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1602873150.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 11220112001 its reverse (10021102211), we get a palindrome (21241214212).

The spelling of 11220112001 in words is "eleven billion, two hundred twenty million, one hundred twelve thousand, one".