21552344330123 has 16 divisors (see below), whose sum is σ = 22136878562400. Its totient is φ = 20975160460800.

The previous prime is 21552344330119. The next prime is 21552344330227. The reversal of 21552344330123 is 32103344325512.

It is a cyclic number.

It is not a de Polignac number, because 21552344330123 - 2² = 21552344330119 is a prime.

It is a super-2 number, since 2×21552344330123² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21552344336123) 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, 60562673 + ... + 60917501.

It is an arithmetic number, because the mean of its divisors is an integer number (1383554910150).

Almost surely, 2^{21552344330123} is an apocalyptic number.

21552344330123 is a deficient number, since it is larger than the sum of its proper divisors (584534232277).

21552344330123 is a wasteful number, since it uses less digits than its factorization.

21552344330123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 365182.

The product of its (nonzero) digits is 259200, while the sum is 38.

Adding to 21552344330123 its reverse (32103344325512), we get a palindrome (53655688655635).

The spelling of 21552344330123 in words is "twenty-one trillion, five hundred fifty-two billion, three hundred forty-four million, three hundred thirty thousand, one hundred twenty-three".