11030431221 has 24 divisors (see below), whose sum is σ = 16021813080. Its totient is φ = 7312674816.

The previous prime is 11030431219. The next prime is 11030431267. The reversal of 11030431221 is 12213403011.

11030431221 is a `hidden beast` number, since 1 + 10 + 3 + 0 + 431 + 221 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1655350596 + 9375080625 = 40686^2 + 96825^2 .

It is not a de Polignac number, because 11030431221 - 2¹ = 11030431219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11030431194 and 11030431203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11030431121) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1230885 + ... + 1239813.

It is an arithmetic number, because the mean of its divisors is an integer number (667575545).

Almost surely, 2^11030431221 is an apocalyptic number.

It is an amenable number.

11030431221 is a deficient number, since it is larger than the sum of its proper divisors (4991381859).

11030431221 is a wasteful number, since it uses less digits than its factorization.

11030431221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9685 (or 9682 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 11030431221 its reverse (12213403011), we get a palindrome (23243834232).

The spelling of 11030431221 in words is "eleven billion, thirty million, four hundred thirty-one thousand, two hundred twenty-one".