12033774021 has 4 divisors (see below), whose sum is σ = 16045032032. Its totient is φ = 8022516012.

The previous prime is 12033774019. The next prime is 12033774061. The reversal of 12033774021 is 12047733021.

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.

It is not a de Polignac number, because 12033774021 - 2¹ = 12033774019 is a prime.

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 12033774021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12033774061) 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, 2005629001 + ... + 2005629006.

It is an arithmetic number, because the mean of its divisors is an integer number (4011258008).

Almost surely, 2^12033774021 is an apocalyptic number.

It is an amenable number.

12033774021 is a deficient number, since it is larger than the sum of its proper divisors (4011258011).

12033774021 is an equidigital number, since it uses as much as digits as its factorization.

12033774021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4011258010.

The product of its (nonzero) digits is 7056, while the sum is 30.

The spelling of 12033774021 in words is "twelve billion, thirty-three million, seven hundred seventy-four thousand, twenty-one".