212410243243021 has 8 divisors (see below), whose sum is σ = 214947851683320. Its totient is φ = 209879733009408.

The previous prime is 212410243242959. The next prime is 212410243243057. The reversal of 212410243243021 is 120342342014212.

It can be written as a sum of positive squares in 4 ways, for example, as 6700384020100 + 205709859222921 = 2588510^2 + 14342589^2 .

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 212410243243021 - 2⁷ = 212410243242893 is a prime.

It is a super-2 number, since 2×212410243243021² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212410243243061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1774491466 + ... + 1774611163.

It is an arithmetic number, because the mean of its divisors is an integer number (26868481460415).

Almost surely, 2^{212410243243021} is an apocalyptic number.

It is an amenable number.

212410243243021 is a deficient number, since it is larger than the sum of its proper divisors (2537608440299).

212410243243021 is an equidigital number, since it uses as much as digits as its factorization.

212410243243021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3549103343.

The product of its (nonzero) digits is 18432, while the sum is 31.

Adding to 212410243243021 its reverse (120342342014212), we get a palindrome (332752585257233).

The spelling of 212410243243021 in words is "two hundred twelve trillion, four hundred ten billion, two hundred forty-three million, two hundred forty-three thousand, twenty-one".