12010011121 has 4 divisors (see below), whose sum is σ = 12010300992. Its totient is φ = 12009721252.

The previous prime is 12010011119. The next prime is 12010011133. The reversal of 12010011121 is 12111001021.

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: 12111001021 = 7 ⋅1730143003.

It is a cyclic number.

It is not a de Polignac number, because 12010011121 - 2¹ = 12010011119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12010011098 and 12010011107.

It is not an unprimeable number, because it can be changed into a prime (12010011421) 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, 69805 + ... + 169978.

It is an arithmetic number, because the mean of its divisors is an integer number (3002575248).

Almost surely, 2^12010011121 is an apocalyptic number.

It is an amenable number.

12010011121 is a deficient number, since it is larger than the sum of its proper divisors (289871).

12010011121 is an equidigital number, since it uses as much as digits as its factorization.

12010011121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289870.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 12010011121 its reverse (12111001021), we get a palindrome (24121012142).

The spelling of 12010011121 in words is "twelve billion, ten million, eleven thousand, one hundred twenty-one".