12021169169 has 4 divisors (see below), whose sum is σ = 12021736944. Its totient is φ = 12020601396.

The previous prime is 12021169159. The next prime is 12021169201. The reversal of 12021169169 is 96196112021.

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: 96196112021 = 379 ⋅253815599.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12021169169 is a prime.

It is a super-2 number, since 2×12021169169² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12021169159) 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, 250847 + ... + 294900.

It is an arithmetic number, because the mean of its divisors is an integer number (3005434236).

Almost surely, 2^12021169169 is an apocalyptic number.

It is an amenable number.

12021169169 is a deficient number, since it is larger than the sum of its proper divisors (567775).

12021169169 is an equidigital number, since it uses as much as digits as its factorization.

12021169169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 567774.

The product of its (nonzero) digits is 11664, while the sum is 38.

The spelling of 12021169169 in words is "twelve billion, twenty-one million, one hundred sixty-nine thousand, one hundred sixty-nine".