11012201001 has 24 divisors (see below), whose sum is σ = 16463495880. Its totient is φ = 7084659456.

The previous prime is 11012200963. The next prime is 11012201009. The reversal of 11012201001 is 10010221011.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 92160000 + 10920041001 = 9600^2 + 104499^2 .

It is not a de Polignac number, because 11012201001 - 2⁷ = 11012200873 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (11012201009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 552135 + ... + 571731.

It is an arithmetic number, because the mean of its divisors is an integer number (685978995).

Almost surely, 2^11012201001 is an apocalyptic number.

It is an amenable number.

11012201001 is a deficient number, since it is larger than the sum of its proper divisors (5451294879).

11012201001 is a wasteful number, since it uses less digits than its factorization.

11012201001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21785 (or 21782 counting only the distinct ones).

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

Adding to 11012201001 its reverse (10010221011), we get a palindrome (21022422012).

The spelling of 11012201001 in words is "eleven billion, twelve million, two hundred one thousand, one".