11123021101213 has 6 divisors (see below), whose sum is σ = 12939024546366. Its totient is φ = 9534018086712.

The previous prime is 11123021101177. The next prime is 11123021101219. The reversal of 11123021101213 is 31210112032111.

It can be written as a sum of positive squares in only one way, i.e., 11114309118969 + 8711982244 = 3333813^2 + 93338^2 .

It is not a de Polignac number, because 11123021101213 - 2⁹ = 11123021100701 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 (11123021101219) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 113500215270 + ... + 113500215367.

It is an arithmetic number, because the mean of its divisors is an integer number (2156504091061).

Almost surely, 2^{11123021101213} is an apocalyptic number.

It is an amenable number.

11123021101213 is a deficient number, since it is larger than the sum of its proper divisors (1816003445153).

11123021101213 is an equidigital number, since it uses as much as digits as its factorization.

11123021101213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227000430651 (or 227000430644 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 11123021101213 its reverse (31210112032111), we get a palindrome (42333133133324).

The spelling of 11123021101213 in words is "eleven trillion, one hundred twenty-three billion, twenty-one million, one hundred one thousand, two hundred thirteen".