11211211201 has 4 divisors (see below), whose sum is σ = 11211949504. Its totient is φ = 11210472900.

The previous prime is 11211211199. The next prime is 11211211213. The reversal of 11211211201 is 10211211211.

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 11211211201 - 2¹ = 11211211199 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11211211001) 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, 345885 + ... + 376906.

It is an arithmetic number, because the mean of its divisors is an integer number (2802987376).

Almost surely, 2^11211211201 is an apocalyptic number.

It is an amenable number.

11211211201 is a deficient number, since it is larger than the sum of its proper divisors (738303).

11211211201 is an equidigital number, since it uses as much as digits as its factorization.

11211211201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 738302.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 11211211201 its reverse (10211211211), we get a palindrome (21422422412).

The spelling of 11211211201 in words is "eleven billion, two hundred eleven million, two hundred eleven thousand, two hundred one".