11221212013 has 4 divisors (see below), whose sum is σ = 12241322208. Its totient is φ = 10201101820.

The previous prime is 11221212007. The next prime is 11221212019. The reversal of 11221212013 is 31021212211.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (11221212007) and next prime (11221212019).

It is a cyclic number.

It is not a de Polignac number, because 11221212013 - 2³³ = 2631277421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11221212019) 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, 510055081 + ... + 510055102.

It is an arithmetic number, because the mean of its divisors is an integer number (3060330552).

Almost surely, 2^11221212013 is an apocalyptic number.

It is an amenable number.

11221212013 is a deficient number, since it is larger than the sum of its proper divisors (1020110195).

11221212013 is a wasteful number, since it uses less digits than its factorization.

11221212013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1020110194.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 11221212013 its reverse (31021212211), we get a palindrome (42242424224).

The spelling of 11221212013 in words is "eleven billion, two hundred twenty-one million, two hundred twelve thousand, thirteen".