11221213013 has 4 divisors (see below), whose sum is σ = 11251297068. Its totient is φ = 11191128960.

The previous prime is 11221212913. The next prime is 11221213037. The reversal of 11221213013 is 31031212211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31031212211 = 167249 ⋅185539.

It can be written as a sum of positive squares in 2 ways, for example, as 8403938929 + 2817274084 = 91673^2 + 53078^2 .

It is a cyclic number.

It is not a de Polignac number, because 11221213013 - 2⁸ = 11221212757 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11221212982 and 11221213000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11221213063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15041468 + ... + 15042213.

It is an arithmetic number, because the mean of its divisors is an integer number (2812824267).

Almost surely, 2^11221213013 is an apocalyptic number.

It is an amenable number.

11221213013 is a deficient number, since it is larger than the sum of its proper divisors (30084055).

11221213013 is an equidigital number, since it uses as much as digits as its factorization.

11221213013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30084054.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 11221213013 its reverse (31031212211), we get a palindrome (42252425224).

The spelling of 11221213013 in words is "eleven billion, two hundred twenty-one million, two hundred thirteen thousand, thirteen".