212320240021 has 8 divisors (see below), whose sum is σ = 214020221184. Its totient is φ = 210621459360.

The previous prime is 212320240003. The next prime is 212320240039. The reversal of 212320240021 is 120042023212.

212320240021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (212320240003) and next prime (212320240039).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 212320240021 - 2¹³ = 212320231829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212320240091) 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 7 ways as a sum of consecutive naturals, for example, 56700 + ... + 654106.

It is an arithmetic number, because the mean of its divisors is an integer number (26752527648).

Almost surely, 2^212320240021 is an apocalyptic number.

It is an amenable number.

212320240021 is a deficient number, since it is larger than the sum of its proper divisors (1699981163).

212320240021 is a wasteful number, since it uses less digits than its factorization.

212320240021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 600251.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 212320240021 its reverse (120042023212), we get a palindrome (332362263233).

The spelling of 212320240021 in words is "two hundred twelve billion, three hundred twenty million, two hundred forty thousand, twenty-one".