212041312421 has 4 divisors (see below), whose sum is σ = 212186647200. Its totient is φ = 211895977644.

The previous prime is 212041312403. The next prime is 212041312451. The reversal of 212041312421 is 124213140212.

212041312421 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212041312421 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 (212041312451) 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, 72665201 + ... + 72668118.

It is an arithmetic number, because the mean of its divisors is an integer number (53046661800).

Almost surely, 2^212041312421 is an apocalyptic number.

It is an amenable number.

212041312421 is a deficient number, since it is larger than the sum of its proper divisors (145334779).

212041312421 is a wasteful number, since it uses less digits than its factorization.

212041312421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145334778.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 212041312421 its reverse (124213140212), we get a palindrome (336254452633).

The spelling of 212041312421 in words is "two hundred twelve billion, forty-one million, three hundred twelve thousand, four hundred twenty-one".