11211212201 has 24 divisors (see below), whose sum is σ = 13202221896. Its totient is φ = 9491731200.

The previous prime is 11211212191. The next prime is 11211212227. The reversal of 11211212201 is 10221211211.

11211212201 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 8745990400 + 2465221801 = 93520^2 + 49651^2 .

It is a de Polignac number, because none of the positive numbers 2^k-11211212201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11211212251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2259215 + ... + 2264171.

It is an arithmetic number, because the mean of its divisors is an integer number (550092579).

Almost surely, 2^11211212201 is an apocalyptic number.

It is an amenable number.

11211212201 is a deficient number, since it is larger than the sum of its proper divisors (1991009695).

11211212201 is a wasteful number, since it uses less digits than its factorization.

11211212201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5529 (or 5522 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 11211212201 its reverse (10221211211), we get a palindrome (21432423412).

The spelling of 11211212201 in words is "eleven billion, two hundred eleven million, two hundred twelve thousand, two hundred one".