11031221201 has 32 divisors (see below), whose sum is σ = 14875031808. Its totient is φ = 7900323840.

The previous prime is 11031221129. The next prime is 11031221203. The reversal of 11031221201 is 10212213011.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11031221201 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11031221203) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 209585 + ... + 256881.

It is an arithmetic number, because the mean of its divisors is an integer number (464844744).

Almost surely, 2^11031221201 is an apocalyptic number.

11031221201 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11031221201 is a deficient number, since it is larger than the sum of its proper divisors (3843810607).

11031221201 is a wasteful number, since it uses less digits than its factorization.

11031221201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47561.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 11031221201 its reverse (10212213011), we get a palindrome (21243434212).

It can be divided in two parts, 11031 and 221201, that added together give a palindrome (232232).

The spelling of 11031221201 in words is "eleven billion, thirty-one million, two hundred twenty-one thousand, two hundred one".