21123342214304 has 24 divisors (see below), whose sum is σ = 45367178165568. Its totient is φ = 9601519188160.

The previous prime is 21123342214279. The next prime is 21123342214309. The reversal of 21123342214304 is 40341224332112.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is not an unprimeable number, because it can be changed into a prime (21123342214309) 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, 30004747112 + ... + 30004747815.

It is an arithmetic number, because the mean of its divisors is an integer number (1890299090232).

Almost surely, 2^{21123342214304} is an apocalyptic number.

It is an amenable number.

21123342214304 is an abundant number, since it is smaller than the sum of its proper divisors (24243835951264).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21123342214304 is a wasteful number, since it uses less digits than its factorization.

21123342214304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60009494948 (or 60009494940 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 32.

Adding to 21123342214304 its reverse (40341224332112), we get a palindrome (61464566546416).

The spelling of 21123342214304 in words is "twenty-one trillion, one hundred twenty-three billion, three hundred forty-two million, two hundred fourteen thousand, three hundred four".