11012013121 has 4 divisors (see below), whose sum is σ = 11020363200. Its totient is φ = 11003663044.

The previous prime is 11012013107. The next prime is 11012013203. The reversal of 11012013121 is 12131021011.

It is a happy number.

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: 12131021011 = 251 ⋅48330761.

It is a cyclic number.

It is not a de Polignac number, because 11012013121 - 2⁷ = 11012012993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11012016121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4173061 + ... + 4175698.

It is an arithmetic number, because the mean of its divisors is an integer number (2755090800).

Almost surely, 2^11012013121 is an apocalyptic number.

It is an amenable number.

11012013121 is a deficient number, since it is larger than the sum of its proper divisors (8350079).

11012013121 is an equidigital number, since it uses as much as digits as its factorization.

11012013121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8350078.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 11012013121 its reverse (12131021011), we get a palindrome (23143034132).

The spelling of 11012013121 in words is "eleven billion, twelve million, thirteen thousand, one hundred twenty-one".