212320230021 has 16 divisors (see below), whose sum is σ = 316551988800. Its totient is φ = 140645245104.

The previous prime is 212320229999. The next prime is 212320230079. The reversal of 212320230021 is 120032023212.

212320230021 is a `hidden beast` number, since 21 + 2 + 320 + 2 + 300 + 21 = 666.

212320230021 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 212320230021 - 2¹⁵ = 212320197253 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212320229976 and 212320230003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212320230121) 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 15 ways as a sum of consecutive naturals, for example, 25039431 + ... + 25047908.

It is an arithmetic number, because the mean of its divisors is an integer number (19784499300).

Almost surely, 2^212320230021 is an apocalyptic number.

It is an amenable number.

212320230021 is a deficient number, since it is larger than the sum of its proper divisors (104231758779).

212320230021 is a wasteful number, since it uses less digits than its factorization.

212320230021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50087505 (or 50087499 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 212320230021 its reverse (120032023212), we get a palindrome (332352253233).

The spelling of 212320230021 in words is "two hundred twelve billion, three hundred twenty million, two hundred thirty thousand, twenty-one".