11211231001 has 4 divisors (see below), whose sum is σ = 11217606400. Its totient is φ = 11204855604.

The previous prime is 11211230983. The next prime is 11211231007. The reversal of 11211231001 is 10013211211.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 11211231001 - 2¹³ = 11211222809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11211231007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3185061 + ... + 3188578.

It is an arithmetic number, because the mean of its divisors is an integer number (2804401600).

Almost surely, 2^11211231001 is an apocalyptic number.

It is an amenable number.

11211231001 is a deficient number, since it is larger than the sum of its proper divisors (6375399).

11211231001 is an equidigital number, since it uses as much as digits as its factorization.

11211231001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6375398.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 11211231001 its reverse (10013211211), we get a palindrome (21224442212).

The spelling of 11211231001 in words is "eleven billion, two hundred eleven million, two hundred thirty-one thousand, one".