11121020213 has 4 divisors (see below), whose sum is σ = 11125205280. Its totient is φ = 11116835148.

The previous prime is 11121020201. The next prime is 11121020257. The reversal of 11121020213 is 31202012111.

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 a cyclic number.

It is not a de Polignac number, because 11121020213 - 2¹⁸ = 11120758069 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 (11129020213) 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, 2088545 + ... + 2093862.

It is an arithmetic number, because the mean of its divisors is an integer number (2781301320).

Almost surely, 2^11121020213 is an apocalyptic number.

It is an amenable number.

11121020213 is a deficient number, since it is larger than the sum of its proper divisors (4185067).

11121020213 is an equidigital number, since it uses as much as digits as its factorization.

11121020213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4185066.

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

Adding to 11121020213 its reverse (31202012111), we get a palindrome (42323032324).

The spelling of 11121020213 in words is "eleven billion, one hundred twenty-one million, twenty thousand, two hundred thirteen".