3012321120021 has 24 divisors (see below), whose sum is σ = 4410922977240. Its totient is φ = 1980619900416.

The previous prime is 3012321120007. The next prime is 3012321120077. The reversal of 3012321120021 is 1200211232103.

3012321120021 is a `hidden beast` number, since 301 + 2 + 321 + 1 + 20 + 0 + 21 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1537424100 + 3010783695921 = 39210^2 + 1735161^2 .

It is not a de Polignac number, because 3012321120021 - 2¹⁹ = 3012320595733 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3012321119976 and 3012321120003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3012321120121) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17836945 + ... + 18005033.

It is an arithmetic number, because the mean of its divisors is an integer number (183788457385).

Almost surely, 2^{3012321120021} is an apocalyptic number.

It is an amenable number.

3012321120021 is a deficient number, since it is larger than the sum of its proper divisors (1398601857219).

3012321120021 is a wasteful number, since it uses less digits than its factorization.

3012321120021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195445 (or 195442 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 3012321120021 its reverse (1200211232103), we get a palindrome (4212532352124).

The spelling of 3012321120021 in words is "three trillion, twelve billion, three hundred twenty-one million, one hundred twenty thousand, twenty-one".