12021329977 has 4 divisors (see below), whose sum is σ = 12067038720. Its totient is φ = 11975621236.

The previous prime is 12021329899. The next prime is 12021330019. The reversal of 12021329977 is 77992312021.

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 a cyclic number.

It is not a de Polignac number, because 12021329977 - 2¹⁵ = 12021297209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12021129977) 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, 22853977 + ... + 22854502.

It is an arithmetic number, because the mean of its divisors is an integer number (3016759680).

Almost surely, 2^12021329977 is an apocalyptic number.

It is an amenable number.

12021329977 is a deficient number, since it is larger than the sum of its proper divisors (45708743).

12021329977 is an equidigital number, since it uses as much as digits as its factorization.

12021329977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45708742.

The product of its (nonzero) digits is 95256, while the sum is 43.

The spelling of 12021329977 in words is "twelve billion, twenty-one million, three hundred twenty-nine thousand, nine hundred seventy-seven".