21243342411214 has 32 divisors (see below), whose sum is σ = 39740299195392. Its totient is φ = 8274024828000.

The previous prime is 21243342411127. The next prime is 21243342411217. The reversal of 21243342411214 is 41211424334212.

It is a self number, because there is not a number n which added to its sum of digits gives 21243342411214.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21243342411217) 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, 21192582 + ... + 22172329.

It is an arithmetic number, because the mean of its divisors is an integer number (1241884349856).

Almost surely, 2^{21243342411214} is an apocalyptic number.

21243342411214 is a deficient number, since it is larger than the sum of its proper divisors (18496956784178).

21243342411214 is a wasteful number, since it uses less digits than its factorization.

21243342411214 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43368112.

The product of its digits is 36864, while the sum is 34.

Adding to 21243342411214 its reverse (41211424334212), we get a palindrome (62454766745426).

The spelling of 21243342411214 in words is "twenty-one trillion, two hundred forty-three billion, three hundred forty-two million, four hundred eleven thousand, two hundred fourteen".