12121023311 has 4 divisors (see below), whose sum is σ = 12378917472. Its totient is φ = 11863129152.

The previous prime is 12121023301. The next prime is 12121023319. The reversal of 12121023311 is 11332012121.

12121023311 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11332012121 = 5591 ⋅2026831.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12121023311 is a prime.

It is a super-3 number, since 3×12121023311³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12121023311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12121023319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 128947010 + ... + 128947103.

It is an arithmetic number, because the mean of its divisors is an integer number (3094729368).

Almost surely, 2^12121023311 is an apocalyptic number.

12121023311 is a deficient number, since it is larger than the sum of its proper divisors (257894161).

12121023311 is an equidigital number, since it uses as much as digits as its factorization.

12121023311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257894160.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 12121023311 its reverse (11332012121), we get a palindrome (23453035432).

The spelling of 12121023311 in words is "twelve billion, one hundred twenty-one million, twenty-three thousand, three hundred eleven".