212302132421 has 4 divisors (see below), whose sum is σ = 212558227500. Its totient is φ = 212046037344.

The previous prime is 212302132391. The next prime is 212302132451. The reversal of 212302132421 is 124231203212.

212302132421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (212302132391) and next prime (212302132451).

It can be written as a sum of positive squares in 2 ways, for example, as 183980944900 + 28321187521 = 428930^2 + 168289^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212302132421 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 (212302132451) 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 3 ways as a sum of consecutive naturals, for example, 128046296 + ... + 128047953.

It is an arithmetic number, because the mean of its divisors is an integer number (53139556875).

Almost surely, 2^212302132421 is an apocalyptic number.

It is an amenable number.

212302132421 is a deficient number, since it is larger than the sum of its proper divisors (256095079).

212302132421 is an equidigital number, since it uses as much as digits as its factorization.

212302132421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256095078.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 212302132421 its reverse (124231203212), we get a palindrome (336533335633).

The spelling of 212302132421 in words is "two hundred twelve billion, three hundred two million, one hundred thirty-two thousand, four hundred twenty-one".