21324321223234 has 16 divisors (see below), whose sum is σ = 32090406720768. Its totient is φ = 10627549360992.

The previous prime is 21324321223229. The next prime is 21324321223307. The reversal of 21324321223234 is 43232212342312.

It is a happy number.

It is a super-2 number, since 2×21324321223234² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21324321223234.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6189222 + ... + 8997505.

It is an arithmetic number, because the mean of its divisors is an integer number (2005650420048).

Almost surely, 2^{21324321223234} is an apocalyptic number.

21324321223234 is a deficient number, since it is larger than the sum of its proper divisors (10766085497534).

21324321223234 is a wasteful number, since it uses less digits than its factorization.

21324321223234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15189009.

The product of its digits is 82944, while the sum is 34.

Adding to 21324321223234 its reverse (43232212342312), we get a palindrome (64556533565546).

The spelling of 21324321223234 in words is "twenty-one trillion, three hundred twenty-four billion, three hundred twenty-one million, two hundred twenty-three thousand, two hundred thirty-four".