11220110001 has 24 divisors (see below), whose sum is σ = 16579665960. Its totient is φ = 7309875456.

The previous prime is 11220109997. The next prime is 11220110009. The reversal of 11220110001 is 10001102211.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 775065600 + 10445044401 = 27840^2 + 102201^2 .

It is not a de Polignac number, because 11220110001 - 2² = 11220109997 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11220110009) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6726 + ... + 149951.

It is an arithmetic number, because the mean of its divisors is an integer number (690819415).

Almost surely, 2^11220110001 is an apocalyptic number.

It is an amenable number.

11220110001 is a deficient number, since it is larger than the sum of its proper divisors (5359555959).

11220110001 is a wasteful number, since it uses less digits than its factorization.

11220110001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156865 (or 156862 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 11220110001 its reverse (10001102211), we get a palindrome (21221212212).

The spelling of 11220110001 in words is "eleven billion, two hundred twenty million, one hundred ten thousand, one".