11211122001 has 16 divisors (see below), whose sum is σ = 15608715264. Its totient is φ = 7144248144.

The previous prime is 11211121973. The next prime is 11211122009. The reversal of 11211122001 is 10022111211.

It is not a de Polignac number, because 11211122001 - 2⁹ = 11211121489 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11211122009) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47970 + ... + 157236.

It is an arithmetic number, because the mean of its divisors is an integer number (975544704).

Almost surely, 2^11211122001 is an apocalyptic number.

It is an amenable number.

11211122001 is a deficient number, since it is larger than the sum of its proper divisors (4397593263).

11211122001 is a wasteful number, since it uses less digits than its factorization.

11211122001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110780.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 11211122001 its reverse (10022111211), we get a palindrome (21233233212).

The spelling of 11211122001 in words is "eleven billion, two hundred eleven million, one hundred twenty-two thousand, one".