12027784821 has 8 divisors (see below), whose sum is σ = 17270665440. Its totient is φ = 7401713712.

The previous prime is 12027784807. The next prime is 12027784823. The reversal of 12027784821 is 12848772021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12027784821 - 2²¹ = 12025687669 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12027784823) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 154202331 + ... + 154202408.

It is an arithmetic number, because the mean of its divisors is an integer number (2158833180).

Almost surely, 2^12027784821 is an apocalyptic number.

It is an amenable number.

12027784821 is a deficient number, since it is larger than the sum of its proper divisors (5242880619).

12027784821 is a wasteful number, since it uses less digits than its factorization.

12027784821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308404755.

The product of its (nonzero) digits is 100352, while the sum is 42.

The spelling of 12027784821 in words is "twelve billion, twenty-seven million, seven hundred eighty-four thousand, eight hundred twenty-one".