11031221013 has 16 divisors (see below), whose sum is σ = 14763805056. Its totient is φ = 7326443520.

The previous prime is 11031220951. The next prime is 11031221017. The reversal of 11031221013 is 31012213011.

It is a happy number.

It is not a de Polignac number, because 11031221013 - 2¹⁴ = 11031204629 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11031220983 and 11031221001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11031221017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 938533 + ... + 950213.

It is an arithmetic number, because the mean of its divisors is an integer number (922737816).

Almost surely, 2^11031221013 is an apocalyptic number.

It is an amenable number.

11031221013 is a deficient number, since it is larger than the sum of its proper divisors (3732584043).

11031221013 is a wasteful number, since it uses less digits than its factorization.

11031221013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12844.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 11031221013 its reverse (31012213011), we get a palindrome (42043434024).

The spelling of 11031221013 in words is "eleven billion, thirty-one million, two hundred twenty-one thousand, thirteen".