11123314021 has 8 divisors (see below), whose sum is σ = 11142921240. Its totient is φ = 11103725568.

The previous prime is 11123314019. The next prime is 11123314061. The reversal of 11123314021 is 12041332111.

It can be written as a sum of positive squares in 4 ways, for example, as 8224676100 + 2898637921 = 90690^2 + 53839^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11123314021 - 2¹ = 11123314019 is a prime.

It is a super-2 number, since 2×11123314021² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11123314021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11123314061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1654615 + ... + 1661323.

It is an arithmetic number, because the mean of its divisors is an integer number (1392865155).

Almost surely, 2^11123314021 is an apocalyptic number.

It is an amenable number.

11123314021 is a deficient number, since it is larger than the sum of its proper divisors (19607219).

11123314021 is an equidigital number, since it uses as much as digits as its factorization.

11123314021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9383.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 11123314021 its reverse (12041332111), we get a palindrome (23164646132).

It can be divided in two parts, 1112 and 3314021, that added together give a palindrome (3315133).

The spelling of 11123314021 in words is "eleven billion, one hundred twenty-three million, three hundred fourteen thousand, twenty-one".