11211210011 has 4 divisors (see below), whose sum is σ = 11211430800. Its totient is φ = 11210989224.

The previous prime is 11211210007. The next prime is 11211210019. The reversal of 11211210011 is 11001211211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11001211211 = 31 ⋅354877781.

It is a cyclic number.

It is not a de Polignac number, because 11211210011 - 2² = 11211210007 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11211209974 and 11211210001.

It is not an unprimeable number, because it can be changed into a prime (11211210019) 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, 8345 + ... + 149973.

It is an arithmetic number, because the mean of its divisors is an integer number (2802857700).

Almost surely, 2^11211210011 is an apocalyptic number.

11211210011 is a deficient number, since it is larger than the sum of its proper divisors (220789).

11211210011 is an equidigital number, since it uses as much as digits as its factorization.

11211210011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220788.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 11211210011 its reverse (11001211211), we get a palindrome (22212421222).

The spelling of 11211210011 in words is "eleven billion, two hundred eleven million, two hundred ten thousand, eleven".