11143121013 has 18 divisors (see below), whose sum is σ = 16339497174. Its totient is φ = 7317843984.

The previous prime is 11143120991. The next prime is 11143121063. The reversal of 11143121013 is 31012134111.

It is a happy number.

11143121013 is a `hidden beast` number, since 1 + 11 + 431 + 210 + 13 = 666.

It can be written as a sum of positive squares in only one way, i.e., 8474675364 + 2668445649 = 92058^2 + 51657^2 .

It is not a de Polignac number, because 11143121013 - 2⁶ = 11143120949 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11143121063) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 97506 + ... + 178307.

It is an arithmetic number, because the mean of its divisors is an integer number (907749843).

Almost surely, 2^11143121013 is an apocalyptic number.

It is an amenable number.

11143121013 is a deficient number, since it is larger than the sum of its proper divisors (5196376161).

11143121013 is an equidigital number, since it uses as much as digits as its factorization.

11143121013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275953 (or 275883 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 11143121013 its reverse (31012134111), we get a palindrome (42155255124).

The spelling of 11143121013 in words is "eleven billion, one hundred forty-three million, one hundred twenty-one thousand, thirteen".