312020021313021 has 16 divisors (see below), whose sum is σ = 476291758012928. Its totient is φ = 177984900817200.

The previous prime is 312020021312999. The next prime is 312020021313059. The reversal of 312020021313021 is 120313120020213.

It is not a de Polignac number, because 312020021313021 - 2⁶ = 312020021312957 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312020021713021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13010580175 + ... + 13010604156.

It is an arithmetic number, because the mean of its divisors is an integer number (29768234875808).

Almost surely, 2^{312020021313021} is an apocalyptic number.

It is an amenable number.

312020021313021 is a deficient number, since it is larger than the sum of its proper divisors (164271736699907).

312020021313021 is a wasteful number, since it uses less digits than its factorization.

312020021313021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26021184912.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 312020021313021 its reverse (120313120020213), we get a palindrome (432333141333234).

The spelling of 312020021313021 in words is "three hundred twelve trillion, twenty billion, twenty-one million, three hundred thirteen thousand, twenty-one".