11121421013 has 4 divisors (see below), whose sum is σ = 11358047040. Its totient is φ = 10884794988.

The previous prime is 11121421007. The next prime is 11121421019. The reversal of 11121421013 is 31012412111.

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, and also an emirpimes, since its reverse is a distinct semiprime: 31012412111 = 163 ⋅190260197.

It is an interprime number because it is at equal distance from previous prime (11121421007) and next prime (11121421019).

It is a cyclic number.

It is not a de Polignac number, because 11121421013 - 2⁶ = 11121420949 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11121420982 and 11121421000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11121421019) 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, 118312943 + ... + 118313036.

It is an arithmetic number, because the mean of its divisors is an integer number (2839511760).

Almost surely, 2^11121421013 is an apocalyptic number.

It is an amenable number.

11121421013 is a deficient number, since it is larger than the sum of its proper divisors (236626027).

11121421013 is an equidigital number, since it uses as much as digits as its factorization.

11121421013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236626026.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 11121421013 its reverse (31012412111), we get a palindrome (42133833124).

The spelling of 11121421013 in words is "eleven billion, one hundred twenty-one million, four hundred twenty-one thousand, thirteen".