11211323201 has 4 divisors (see below), whose sum is σ = 12073732692. Its totient is φ = 10348913712.

The previous prime is 11211323173. The next prime is 11211323209. The reversal of 11211323201 is 10232311211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10232311211 = 137 ⋅74688403.

It can be written as a sum of positive squares in 2 ways, for example, as 5343610000 + 5867713201 = 73100^2 + 76601^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11211323201 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11211323201.

It is not an unprimeable number, because it can be changed into a prime (11211323209) 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, 431204726 + ... + 431204751.

It is an arithmetic number, because the mean of its divisors is an integer number (3018433173).

Almost surely, 2^11211323201 is an apocalyptic number.

It is an amenable number.

11211323201 is a deficient number, since it is larger than the sum of its proper divisors (862409491).

11211323201 is an equidigital number, since it uses as much as digits as its factorization.

11211323201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 862409490.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 11211323201 its reverse (10232311211), we get a palindrome (21443634412).

The spelling of 11211323201 in words is "eleven billion, two hundred eleven million, three hundred twenty-three thousand, two hundred one".