212310312021 has 12 divisors (see below), whose sum is σ = 306680730720. Its totient is φ = 141535463400.

The previous prime is 212310311999. The next prime is 212310312023. The reversal of 212310312021 is 120213013212.

212310312021 is a `hidden beast` number, since 21 + 2 + 310 + 312 + 0 + 21 = 666.

212310312021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 212310312021 - 2⁹ = 212310311509 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212310311985 and 212310312003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212310312023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 100401 + ... + 659318.

It is an arithmetic number, because the mean of its divisors is an integer number (25556727560).

Almost surely, 2^212310312021 is an apocalyptic number.

It is an amenable number.

212310312021 is a deficient number, since it is larger than the sum of its proper divisors (94370418699).

212310312021 is a wasteful number, since it uses less digits than its factorization.

212310312021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 790776 (or 790773 counting only the distinct ones).

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

Adding to 212310312021 its reverse (120213013212), we get a palindrome (332523325233).

The spelling of 212310312021 in words is "two hundred twelve billion, three hundred ten million, three hundred twelve thousand, twenty-one".