212340434032421 has 16 divisors (see below), whose sum is σ = 224936460677376. Its totient is φ = 199756124891136.

The previous prime is 212340434032381. The next prime is 212340434032427. The reversal of 212340434032421 is 124230434043212.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 212340434032421 - 2¹⁴ = 212340434016037 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 (212340434032427) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2248202420 + ... + 2248296866.

It is an arithmetic number, because the mean of its divisors is an integer number (14058528792336).

Almost surely, 2^{212340434032421} is an apocalyptic number.

It is an amenable number.

212340434032421 is a deficient number, since it is larger than the sum of its proper divisors (12596026644955).

212340434032421 is a wasteful number, since it uses less digits than its factorization.

212340434032421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155068.

The product of its (nonzero) digits is 110592, while the sum is 35.

Adding to 212340434032421 its reverse (124230434043212), we get a palindrome (336570868075633).

The spelling of 212340434032421 in words is "two hundred twelve trillion, three hundred forty billion, four hundred thirty-four million, thirty-two thousand, four hundred twenty-one".