11221211201 has 8 divisors (see below), whose sum is σ = 11334918504. Its totient is φ = 11107555200.

The previous prime is 11221211171. The next prime is 11221211219. The reversal of 11221211201 is 10211212211.

It can be written as a sum of positive squares in 4 ways, for example, as 7983601201 + 3237610000 = 89351^2 + 56900^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11221211201 - 2⁶ = 11221211137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11221211101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 551261 + ... + 571253.

It is an arithmetic number, because the mean of its divisors is an integer number (1416864813).

Almost surely, 2^11221211201 is an apocalyptic number.

It is an amenable number.

11221211201 is a deficient number, since it is larger than the sum of its proper divisors (113707303).

11221211201 is a wasteful number, since it uses less digits than its factorization.

11221211201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25651.

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

Adding to 11221211201 its reverse (10211212211), we get a palindrome (21432423412).

The spelling of 11221211201 in words is "eleven billion, two hundred twenty-one million, two hundred eleven thousand, two hundred one".